How well do you pay attention? Probably not as well as you think.

In this epic prank, which they call the Ninja Speed Person Switch, one guy starts a conversation with someone, and midway through the conversation, he switches with another guy dressed just like him. You'll be surprised how many people don't even notice the switch.

Unfortunately, the prank doesn't always work and the duo gets caught mid-switch a few times. Although when it does work out the results are glorious.