Shouldn't come as too much of a shock, but Jeff Mangum of Neutral Milk Hotel-- a guy who values his privacy and doesn't often appear onstage-- joined his old friends on the "Elephant 6 Holiday Surprise Tour" for their stop last night at New York's Knitting Factory. The video and sound are a bit hard to make out, but it looks as though that's him on the right in the flannel shirt shouting along through Olivia Tremor Control's terrific "The Opera House" (there's no missing Mangum's former bandmate, the bearded Scott Spillane, anyway). He's also there at the tail end of "I Have Been Floated", a song from OTC's Black Foliage, and joins in on Elf Power's "The Arrow Flies Close". He didn't do any of his own songs, apparently, but nice to see everyone up there partying like it's, well, 1999. (Big thanks to Brian at the Daily Cross Hatch for the tip and video)."The Opera House" "I Have Been Floated" "The Arrow Flies Close"