[Probably the reason Tadashi ordered it for Hiro despite the fact that the younger Hamada only had two slices himself. Still, he's keeping an eye on Dipper and there's a more genuine smile when he notices his friend taking a slice. That's a good sign.

Not a good sign: having to explain everything that happened out there. He pauses for a minute, already reasoning that if he explains then Dipper will probably explain to him.

Probably.]

Did you know that the masks could affect people if they were worn for periods of time? Like...it changed their personalities. Did you know that?