Oh, and this isn't quite what you're looking for (and it isn't Celtic), but i always find this clip funny.
It's Scotland vs France, and this is taken by someone in the crowd when Scotland score to make it 1- 0.
Madness isn't the word.
Kinda shows the passion in football though. You don't see that in American sports. All you see them do is give each other high-fives and make "whoop" noises...