Most of my unit performed a song on stage (the first act after the "big" songs) for which I played guitar!

Sorry to hear that you couldn't hear or see anything; I know the screen wasn't wokring at all for us or "Meat Loaf" David, and the sound was very bad for us too! (I don't think our singing was as load as it could have been either)
We were lucky to have front seats after performing because we had just come of the stage!
It's a real shame that Aether were at the back for both cermonies (I was on Aether, and was the furthest forward of Aether for opening show - but still far far back.)

- Neil
P.S. I'll write a full list of the closing ceremony in another post if you want, I can remember it quite well and will ask help from some others if needed.