A man walked around San Francisco high-fiving random strangers while wearing a GoPro and captured all their reactions.
Designer and engineer Andrew Maxwell-Parish affixed a GoPro camera over his shoulder using a helmet and a swing arm and then attached a microprocessor to his wrist that signaled the camera to only record when his hand was raised. He then walked around San Francisco's waterfront offering high-fives to random people.
Almost all of the strangers smiled as he approached and gave him an enthusiastic high-five back. Maxwell-Parish calls high-fives "the quickest and most universal gesture for telling someone, 'You are awesome!'"