Video: Shark charges at visitor, cracks aquarium glass

Always follow the 'do not touch' signs wherever you go. A visitor at the International Spy Museum in Washington learnt it the hard way.
Even though the glass exhibit, showing a shark swimming, read Do not touch', the visitor Mr. Heinzman went ahead and touched it out of curiousity. 
It is when he continued to tap the glass that a shark charges at him and smashes the aquarium glass. Unprepared for this attack, he falls on the ground scared. 
The shark exhibit at the museum is a well-known troll and has fooled many people before this. 
Watch the video below: