This is TEDTalks from the TED Conference.

Basically, the guy in this video (Charlie Todd) talks about his experiences doing improv in public places.

For example — having lots of people entering a Best Buy wearing khakis and a blue shirt so that they look like a Best Buy employee…or running through a library looking like someone from ghostbusters. He shows one of his subway improvs too — where people from different stops keep entering a subway cart wearing no pants during winter.