Did it Leave a Mark? trick
A Hilarious Sight Gag For The Close-Up Or Stand-Up Magician
The magician removes a long balloon and stretches it between his hands. When the magician raises the balloon to his lips to begin blowing it up, the balloon accidentally snaps back out of his hand and hits him in the nose, jerking his head back! When the magician faces the audience again, he asks, "Did it leave a mark?" and everyone sees a large red clown nose has appeared on his face!