House of the Amazing Grace

The funniest thing about this video isn't my singing. There a strange audio glitch, courtesy of YouTube right at the end, that if I didn't know any better, sounds for all the world like tape wobble... I've heard plenty of audio weirdness on YT, and this one has plenty in other places on the track, too, but not like this one at 3:48. What the...? I'm leaving it there, kinda fits...

http://www.youtube.com/watch?v=JAMULIqEUKs