The first alteration almost sounds like it was intentional, altho there was the slip up at 6:03 that definitely was not intentional.
But yeah, I like little things like that - mistakes that they manage to pull off and go back into the song as if it was intentionally done. Can't remember what show I was listening to, but there was an occasion like that and the way JP played it off was awesome. Definitely would love to see some of those mistakes become intentional things!