Chewbacca's reaction allows him to deal double the amount of damage just dealt to him, back at the opponent. I'm assuming that if a single unit does enough damage to kill Chewbacca (ie: someones does 4 damage in one attack) that Chewie dies before he can use his reaction. Is this correct, or does the reaction take place before the card leaves play? The rulebook says units who receive damage equal to their damage capacity are IMMEDIATELY discarded, but I wanted to check this interpretation.