Robin Williams was once performing for the USO when he got a huge surprise. The entire audience stood up suddenly, in the middle of his routine, and turned their backs on him! And they stayed that way for several minutes! Why? Watch the video to find out!

I'm sure it won't surprise anyone to learn that Robin handled the situation like a champ, immediately incorporating it into his act. No one does improv the way he does!

Now, I will warn you (although I doubt I have to) that this is Robin Williams, so the language is a bit strong. The makers of the video did their best to bleep it out, but it leaves nothing to the imagination. So if strong language offends you, you might want to skip this one.