1) The Ol’ Switcheroo – Ask a volunteer to give you one dollar. Hand it back, transformed into a 100 dollar bill. [Non-magicians DO NOT READ – It’s very dark at the bottom of the well. They won’t know you just gave them their dollar back.]
2) The Vanishing Act – Tell the audience you have vanished. Then remain quiet and still, in the dark of the well, until they applaud. (This can take a while.)