There is a scene when Jesse takes off Joey's oven mitt and spits the flounder tart he inadvertently ate into it, and places the mitt back on Joey's hand. Later, when Jesse and Joey are preparing to teach Nicky and Alex about forgiveness, Joey takes off the mitt, and his hand is clean.
When Nicky and Alex are messing around with the game of Hungry Hungry Hippos, it falls to the floor and is upside down. Then the game is right side up when Michelle is about to pick it up.
The first time Comet presses down on his Hungry Hippo lever he misses, but it makes the sound anyway.