Town Called Malice by The Jam. I'd been taken by surprise that The Fear of being on stage had got me, but was mostly able to keep my fingers working. I was going fine until the bit where everything but the bass drops out for a couple of bars, and although I hit all of the right notes, in the right order, they were not necessarily hit at the right moments. The classic driving Motown-esque bassline was rendered in a hesitant and staccatto style.
Since them, I've beaten The Fear, and feel quite comfortable on stage, but I still don't like playing that song if I can possibly avoid it.