You should always let a Wookie win. A deleted scene from Star Wars: The Force Awakens surfaced recently and shows Chewbacca ripping an arm off.
In the deleted scene Unkar Plutt, played by Simon Pegg, confronts Rey, played by Daisy Ridley, for not selling him the BB-8 droid. Chewbacca then steps in and rips Plutt’s arm off. Plutt appeared to be all CG until Chewie ripped his arm off.
According to the Hollywood Reporter, the gag of Chewie ripping people’s arms off goes back to 1977’s Star Wars: A New Hope. In that film, Han Solo tells C-3PO to always let Wookies win when they are playing a game. Solo then tells 3PO that Wookies are known to rip people’s arms out of their sockets when they lose.
The deleted scene has over 2.3 million views on Youtube already. You can check it out below: