I thought Villa took his shirt off as the atmosphere suddenly rocketed at that point, so he was involved in the catharsis.
After we went 0-1 down there seemed to be a palpable pessimism in the crowd and it was joy when we equalised. But then when that pass came out of nowhere and we were all turning to look at that part of the pitch, DV took two quick and sweet touches and the ball was in the net!
Really seemed to me like everyone just exploded with joy at that point - the noise and the cheering were amazing! So, i'm not surprised he tore his shirt off - I would have done the same thing if it weren't for the threat of a public indecency charge.