Concept: The Pines family learns that Bill is now trapped in a statue that’s stapled to a tree and they all show up in the forest, stand around him and make endless “hanging around” jokes and tree puns.

“Welp, we finally got that three-sided jerk to leaf us alone.”

“He used to be so focused on world domination, I’m glad he managed to BRANCH out!”

“Ha! Good one, pumpkin!”

“Isn’t this a ponderosa? Looks like he finally found a Pine willing to put up with him.”

“Personally I think all this is a little over-ELM-ing.”

“Can you think of any way he might get out of this, Grunkle Ford?”

“No, Dipper. Frankly, I’m stumped.”