In the middle of a battle scene next movie he's doing a ridiculous spin and deeply cuts his wrist. He is super excited. "I am my grandfathers true heir!"

The people he's fighting sneak off as he's calling up Phasma and Hux to tell them the good news. "Yeah, no, it's probably going to get infected and fall off. And you guys said I was dumb for ordering all those bad ass prosthetics in advance."

They're both yelling at him to stop rubbing dirt in his wound and chase after the enemy. He's like, "I have to come home and tell grandfathers helmet/crushed skull immediately!"