The Amazing Mumford is a talented magician from Sesame Street, but his magic tricks sometimes go awry. His characteristic magic words are "A la peanut butter sandwiches!" After saying this and waving his wand, there is a puff of smoke usually accompanied by either a "poof" noise or magical tinkling sounds, and then after clearing, it reveals how the trick has gone wrong. Grover often appeared as Mumford's over-eager assistant.