Buffalo Gil stumbles across a music box and decides to give it a whirl.
I always hated these things when I was a kid. Jack in the Box always freaked me out, even when I knew it was going to pop out. This pencil test is a little interpretation of the adrenaline that ran through my head before the Weasel went "POP"!.
The layout and animation sketches for this test can be found here if you wish to look at how I came up with the idea.