Most of the time spam is annoying (especially the sheer volume of it) but other times it's funny, particularly so when there are several in a row that makes for a hilarious mental image. (or for a strange sentence)
This is just about the best 12 minutes I've ever spent on YouTube. I was a little fuzzy on just a few at the first, then around the 60th riff it started losing me, but it's still a great video.