[Source:  Chapel Hill Snippets]

A very popular website is Improv Everywhere.  I’ve been following them for years, and essentially, in NYC, people gang up and doing very unexpected things, garnering attention and laughter from those who are not part of the prank.
Some of these are great for illustrating what ‘unexpected’ means, and then using screen shots of videos to capture people’s reactions.   It’s awesome for having kids try to determine both how the unsuspecting people are feeling, and then determining what they might be thinking.
Read the Rest of this Article – and Watch a Few Videos – on Chapel Hill Snippets