No matter what the setting, when a crowd starts clapping along to the beat of music, there will always be at least one person who is off, amirite?

When I went to see Rise Against last year, Tim came out with his acoustic guitar and started playing Swing Life Away; when people started clapping out of time, he stopped and was like "okay, so I'm totally fine with you guys clapping, but it kinda screws me up if you're all over the place... so I'll give you a beat to start you off, you clap in time, and we'll all be happy."
It was funny xD