Hoo buddy. Peter can't tell just how tightly Joe has Drake by the wrist, but the way he's acting all of a sudden has Peter on high alert. He snatches Joe by the wrist, not hard enough to hurt, but hopefully firmly enough to send a message. That message being 'get off my bro's arm, dude'.

"We won't make you go anywhere you don't wanna go, okay? Relax."