In the scene where Pee Wee comes to Mario's magic shop, there is a minor slip up worth watching for. Pee Wee is looking at some items and then Mario tells him that he has some new stuff to show him. Mario then snaps his fingers and vanishes into a puff of smoke. If you look closely, you can see Mario duck down as the smoke starts to clear off. Obviously he didn't vanish into thin air. But he ducked a little too late and it's seen on camera. Watch for it.