UHHH... OK, this can't be right - I searched the board for the key words "helium" and "skeleton" and the only result I got was some "random mp3 survey" thread from 2006 in which the words I was searching for had nothing to do with Helium, the band, and their song "Skeleton". Are you telling me that never in the history of Sonic Youth Gossip has it been discussed that "Sunday"'s main riff comes from that tune?
http://www.youtube.com/watch?v=NtwJ4j-W-z0