Guys look! It's human trash fire, Billy Hargrove. He's coming in from Stranger Things season 3, like... right after he died. So. Lots of confusion. Lots of regrets. Lots of being sorry for being such as asshole to everyone and their mom and dad and aunt and eighth cousin once removed. After being possessed by the Mind Flayer (who everybody hates boo), Billy is going to have some left over powers that he'll have NO IDEA how to control. So if he breaks a few doors, please forgive him. He is trying and that's all that matters. RIGHT?