Apologies for the dodgy quality, I have been struggling with scanners and software (BTW GIMP and I are not BFFs) , so imagine it's me flipping through a book of stuff for you to look at.
I drew this on an airplane!
Flip book style animation. The Things look at each other and take turns inflating their heads bigger and bigger. Eventually one of the Thing's heads explodes, leaving an excited line! The other Thing looks at this turn of events with delight and then its head also explodes.