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The "Exploding Piano Gag" is a recurring gag in Looney Tunes, first introduced by director Bob Clampett in the Private Snafu cartoon Booby Traps. It was later adopted and developed by director Friz Freleng.
The gag often features the cartoon's antagonist rigging a piano key with dynamite when the protagonist is about to play Those Endearing Little Charms. Naturally, the protagonist skips over the key, and the antagonist tells them to try again; after the same thing happens once or twice, the antagonist exasperatedly shows them how to play the song correctly, resulting in them getting blown up. This was ruled out in Slappy Goes Walnuts, Doug the Dog is blown up instead, Slappy confirming "Old gag, new twist".
|Private Snafu||Private Snafu|
|Wile E. Coyote||The Road-Runner|
|Show Biz Bugs||Daffy Duck||Bugs Bunny|
|Ballot Box Bunny||Yosemite Sam||Bugs Bunny|
|Slappy Goes Walnuts||Slappy Squirrel||Doug the Dog|