Good Lord & sweet Jebus!

My parents are out of town and I'm left with my nephew. He mistakenly took my batch of marijuana brownies for a batch of regular brownies. Now he looks redder than usual. At first he went on about building a spaceship while banging a Gamecube controller against his toy box, now he won't stop repeating, "I'm Spongebob Square Man!" and calling me Patrick. Any advice? What the heck do I do?