Museum Visitor Completely Freaks After Tapping On 'Shark' Tank

A museum exhibit in Washington, D.C., features a video of a shark attack that’s so realistic it left at least one visitor on his butt on the floor.

Gregory Heinzman couldn’t miss the warning on the set of screens at the International Spy Museum: “Touch at your own risk.” They were showing an image of what appeared to be the inside of a shark tank, with a great white swimming by.

Heinzman first timidly touched the glass, then began insistently tapping before the image of the great white came right at him, jaws gaping, and appeared to crack the glass.

Heinzman flew backward and landed with a thud on the floor. It was all caught on video — which went viral onYouTube— by his pal Casey Peck.

The display is part of a museum exhibit called “Earth Redesigned.” The show includes the vision of fictional characterKarl Strombergof the James Bond book and film “The Spy Who Loved Me,” and his ideas about a post-apocalyptic war world beneath the sea.

“What would Stromberg’s world be like?” the museum asks on the display’s webpage. “Find out as you experience the residents in our virtual shark tank ... but be careful — you never know when one might attack!”

This article originally appeared on HuffPost.