BT!PJ: Wait, I got a better idea.
LATER..
BT!PJ: (Drinks the invisibility potion, puts on the bedsheet, and goes over to Pallette) OOoooooo... I'm a ghost! Ooooooo...
[The prank wasn't that. The prank actually is if Palette takes off the bedsheet BT!PJ was wearing, he'd think it was a real ghost and not PJ pranking him.]