What Conan O'Brien will occasionally do in the introduction to his show. It involves licking his hands, drawing up fake strings and lifing his hips, starting on the right, and going the left, then "cutting" the string with "scissors" (his right hands), then dropping his leg hard. This is usually accompanied by small symbal hits by Max Weinberg.
"Oh man, Late Night with Conan O'Brien just started!"
"I wonder if he'll do the string dance tonight!"