The poor little brass sample sounds like it's just not cut out for the job and severely clashes with the awe-inspring rest, but for me, that effect actually adds something. The rest stays incredibly solemn, maybe even spiritual, while you can clearly tell that that goofy bleat is doing its best, and it actually manages to get closer to the other elements towards the end.
It's probably not even meant to be humorous, but I'm amazed by the uniqueness of a comedic element fitting into a very serious track without diminishing either aspect (the closest things I can think of would probably be some Earthbound mixes and Mak Eightman's Skull-Head).
I just listened to this for the first time and I can tell that it's going to be a favourite.