Changes

"The One You've Been Waiting For" is the [https://www.youtube.com/watch?v=YNCArPzIbBQ title of a song] by Nick Cave, released in 1997. It can also be seen as a sardonic comment over the fact that this is the episode where [[Hitler]] appears. It also references the Grenade Launcher, the largest and (presumably) most destructive weapon in the Impala's arsenal. Despite being very noticeable to the audience due to it's its size and bulk, it was never used, interacted or mentioned in any way before. It is has been part of the arsenal since the first episode, implying that the audience - and Dean - wanted to see it on in action for a long time.