I'm not sure if this is really art-worthy (or topic-worthy, for that matter), but I was fooling around with Autodesk Animator (a very excellent 17-year-old DOS-based animation program) and made a short little animation thingy. With a Yoshi.
It's only a rough animation, but I'm not expecting I'll ever clean it up.
(And ignore the lack of spikes/etc., and the little symbols).
So: Yoshi jump.