In what way does Anders react to the man with the pistol's use of 1940s slang and what is the end result?

Anders reacts to the man with the pistol's use of the word "Capiche" (33) by collapsing into hysterics. He repeats the word once, gasps out the words "Oh god" (34) and repeats the word again as he laughs heartily. "At that" (34), the man raises his pistol and shoots "Anders right in the head" (34).