Remember in the original Star Wars film when Han Solo pressured C-3PO into losing the game of Holochess against Chewbacca, as Wookiees have a nasty habit of ripping their opponents arms out of their sockets when they lose?
Well, it turns out that Han wasn't making empty threats, because a deleted scene from The Force Awakens has found its way onto Youtube, and it shows Chewie settling a conflict with Unkar Plutt by literally tearing off his arm and throwing it across the room. So yeah, always let the Wookiee win.