Sam: Life's too short. We need to do something fun.
Dean: Got it.
*later*
Cas: What Sam meant was to do something fun and not entirely dangerous, NOW OUR LIVES ARE GOING TO BE CUT SHORT!
Dean: *about to parkour off of a building* Life's too short.
Sam: Yours will be if you don't get off right nOW–
Dean: PEACE! *parkours off, breaks his leg*
Cas: Dumbass.