When I was at GMM '06 we had sort of lost one of our friends. It was the last day and already way past midnight, so we started wandering about the campsite to look for him. Then at some point, when we were walking on one of the main roads, we noticed these rows of closed beer cans on each side of the road. So, naturally, we were like 'yay free beer!' But we carefully inspected the cans first, as you never know what might have happened to them. And then, as we were about to decide that they seemed fine, we heard someone shouting in the distance: "Yeah, those people already left and left loads of beer! Do you want some?" Next thing I know, they started throwing more beer cans in our direction and it was literally raining beer!
Also, at the same festival, I had spent about an hour looking for my tent. And I was sober! I walked up and down the lane I was sure my tent was at like 10 times without finding it. Then, as I was making one desperate, final attempt to find it before giving up completely, I suddenly heard some guys from my group calling my name. I was astounded to find that my tent was covered by a random gazebo tent. It had just been placed around it, so there really was no sign of my tent! So I asked the guys if they knew where it came from, but they had no idea. So I sat down with them and didn't mind it any more. That is, until 4 guys in thongs suddenly came running by, each picking up one leg of the tent and ran off with it! And we were left sitting there like wtf? :/.