#20 Devo - Gut Feeling/Slap your Mammy (Q: Are we not men? A: We are Devo)
I saw the spud boys around 1980, and I'm pretty sure this was their encore medley. They came out in all black, one wearing D, one E, one V, one O, on his T shirt. "Gut Feeling" started even slower and laid back than the studio version, slowly building up to the bass, then percussion, then keyboard, and finally the sublimely antic Mark Mothersbaugh steps to the mike. When he gets to the "gut feeling" line, he literally reaches toward his midsection and throws his hands in the air each time. The crowd is going nuts toward the end of the tune.
Then comes the coup de grace, "Jocko Homo," in which the T-shirts are deployed to devastating effect. During the final call-and-sequence (Mothersbaugh asks "Are we not men?"; the band, and about 8,000 frenzied, mostly intoxicated audience reply "We are Devo!) the house and stage lights are turned off, leaving only the phosphorescent letters DEVO hopping around on stage as one singing "We are Devo!" for several minutes. The audience was so wild at this point I could hardly hear my girlfriend and I laughed our asses off.
Probably not the best concert I've ever seen from a musical perspective, but it was the most entertaining, hands down.