Ed from FMA can get angry when someone mentions the word small or something similar to the word "small" like Shrimp,Beansprout,Sprout,Shorty the list goes on..:P
johan liebert. the guy he is aiming at said no to shooting him, who wouldn't say no to killing there friend! well just to say the guy he was aiming at johan shoots him and kills him.if that's not anger issues then i don't know what it is.