Fair play to Celtic, beating the best team on the planet, I can't fault them. Winning a football match with 11% posession is funny, but they stuck to their gameplan and got a result.
All that annoys me are the goons on my FB stream, 2 minutes after beating Barca are straight on it saying "hahah **** Rangers", rather than "we won woo!" or whatever that you would expect. Of course, that's just because of the dicks I have on my FB and I'm sure it's not representative of Celtic fans, I'm sure most were celebrating.