Talk about an uninvited guest at the Olympics.
Friday night's spectacular pyrotechnics display of the most watched opening ceremony in summer Olympics history attracted more than the eyes of over 40 million people. A clearly seen unidentified flying object was videotaped making its way over London's Olympic stadium, reports Examiner.com.
Watch as the UFO approaches London's Olympic stadium.
The disc-shaped object is first seen entering the upper left portion of the video as the fireworks erupt over the stadium. The UFO -- which appears to have a dome or bulge rising from its center -- moves slowly across the sky as if deliberately observing the light-show spectacle below it.
While NBC Olympics -- a division of NBC Sports -- has chosen Goodyear blimps for all of its 2012 Olympics aerial coverage, the strange-looking object that appeared over the opening ceremonies doesn't appear to be a blimp.
So what was it?
YOU BE THE JUDGE:
On an evening that included an apparent Queen Elizabeth and 007 agent James Bond parachuting out of a helicopter into the Olympics stadium, most people probably wouldn't have been surprised if a staged UFO was also on the entertainment menu, just two weeks after the U.K. released its most recent batch of UFO documents.
Last month, former Ministry of Defense UFO desk officer Nick Pope suggested that a huge event like the London Olympic Games, could present itself as a prime target for otherworldly craft to show themselves to a gigantic viewing audience.
"With the summer of mass events, we are all on high alert for terrorism. But we must also cast our eyes further afield and be prepared for even the most seemingly unfathomable," Pope said, according to PressTV.
PHOTOS: THINGS MISTAKEN FOR UFOS
These candle-lit Chinese lanterns can rise high into the sky and are often mistaken for UFOs.
This is a composite image of how three alleged UFOs maneuvered about in the sky over Melbourne, Australia, in early February, 2013. The final verdict isn't in yet on whether they're birds, aircraft, balloons, bugs or something truly unidentified.
On Dec. 20, 2012, a bright, circular object (pictured at the top of this composite image) was videotaped exploding in the skies above Sacramento, Calif. It wasn't immediately identified, resulting in speculation that it was either an alien spacecraft, military top secret weapon, runaway planet, North Korean satellite, among others. Within a short period of time, it became apparent that this was a weather balloon. The bottom part of this image shows such a balloon as it ascended over Tampa Bay, Fla., on July 2, 2012, and exploded in an identical manner as the Sacramento object, probably much to the dismay of all true ET believers out there.
This is a composite of images shot by two eyewitnesses of a boomerang-shaped UFO they reported seeing over their Burbank, Calif., home on Oct. 5, 2012. Mutual UFO Network photo/video analyst Marc Dantonio concluded the object was likely "a balloon, floating on the wind that has collapsed in half."
This four-image series of lights in the sky was recorded over Warren, Mich., on Jan. 10, 2013. The lights were seen changing into several patterns. The most logical explanation for these types of UFOs is a series of balloons or lanterns.
This composite image shows four different times that alleged UFO were photographed above Earth by either space shuttles or the International Space Station. The big question is whether or not they are truly unidentified objects or if they are more likely reflections from spacecraft windows, meteors or fast-moving spacecraft-generated debris.
What appear to be pink-red UFOs are actually lens flares from the Google Earth street view camera as it snapped images in Texas (left) and New Mexico (right).
These two flying saucer-shaped, pink-colored lens flares were created by the Google Maps camera as it drove through locations in Sedona, Ariz. (left) and Flagstaff, Ariz. (right). The images were snapped in April 2009. Submitted to HuffPost by trenna.
This skybound lens flare was created by a Google Maps camera in June 2008 over Whiteriver, Ariz. Submitted to Huffington Post by Cheryl Weeks.
This very Earthbound lens flare was created by a Google Maps camera in November 2007 at Gulfport, Miss. Submitted to Huffington Post by Jenni Parker.
This seemingly grounded lens flare was created by a Google Maps camera in January 2008 at Eureka Springs, Ark. Submitted to Huffington Post by SE.
This lens flare appears to be following a car. The Google Maps image was created in October 2008 at Escanaba, Mich. Submitted to Huffington Post by Mary Robinson.
On the night of Sept. 28, 2012, a group of strange-looking lights appeared in the sky near Cincinnati, Ohio. First there was one, then, two, then three lights, slowly descending. It turns out, however, that these lights were originating from a group of skydivers performing a pyrotechnics jump at the La Salle High School homecoming event.
Some UFO sightings may be due to a natural phenomenon known as sprites, like this one shown from 2006. "Lightning from [a] thunderstorm excites the electric field above, producing a flash of light called a sprite," said geophysicist Colin Price.
Clouds: Saucer-shaped or "lenticular" clouds that form at high altitudes have been confused with UFOs.
Blimps or advertising balloons: These can look like flying saucers from some angles, especially at night.
On June 19th the Swedish-based diving company Ocean Explorer discovered something they've never quite seen before. They were exploring in the Baltic Sea between Sweden and Finland looking for sunken treasures when a very unusual image suddenly appeared on the sonar. A 197 feet diameter cylinder shaped object was discovered at the depth of approximately 275 feet which resembles the Millennium Falcon from the movie Star Wars.
An image released on June 15, 2012, shows a close-up view of the unidentified object sitting on the bottom of the Baltic Sea.
Close-up of rock bed that forms the Baltic Sea UFO, which still mystifies researchers.
One of several odd stone circle formations, sitting on top of the unidentified object at the bottom of the Baltic Sea.
A circular UFO hovers above the Neumayer-Station III research facility in Antarctica on Aug. 10, 2012. Theories ranging from a simple weather balloon to a more elaborate ship from another planet have run the Internet gamut. The next slide shows a closeup of the object.
This is a closeup of the UFO from the previous slide. No official explanation has been offered about the object.
Pictured is a quad copter -- a deliberately manufactured UFO created by special effects wizard Marc Dantonio for a National Geographic special, "The Truth Behind: UFOs," which aired in December 2011. On the left is what the small device looks like resting on the ground, measuring 4 feet in circumference. At right, is how it appeared behind a tree in the night sky.
In February of 2012, this fireball was captured by a Texas police chief's A dashboard camera. F.A.A. say this was probably a meteor, falling to Earth. .
Meteors: Space debris can create a spectacular light show when it burns through the Earth's atmosphere, and sometimes reported as UFOs.
Civilian or military aircraft: Planes can look mysterious at night or in certain light conditions, thus confusing an observer.
Pope wrote earlier this year of a conspiracy theory rumor that suggested a fake alien attack would be staged at the London Olympics.
"A combination of special effects and holographic technology will be used to create the illusion of an alien invasion, the rumor claims," Pope wrote on TruTV.com.
"If aliens have studied our psychology, they may choose to appear in our skies on a significant date -- the closing ceremony of the Olympic Games is one date being widely circulated by conspiracy groups," PressTV quoted Pope.
Maybe Friday night's UFO appearance was a dress rehearsal.
Watch this enhanced video of the Olympics UFO.