Because the jello pit got too cold for him to hang out in. Someone cleared out the jello and turned it into a hot tub this fall, and that was too hot for him. He's probably a candidate for the recovery ward. The guy just can't get comfortable.

There is an unusual haze drifting off of the hot tub--time to lower the heat to simmer is my guess. I wonder if MMario has been poaching salmon in it again?