Be careful up there:
Student 1: "I was in the Trendy Bar last Saturday. You know, the bar a few doors up from the Glenferrie? No? Anyway, I was up on the roof, in the open air part where the smokers go, sitting at one of the tables with my girlfriend and a mate when I felt a bit itchy in the arse. I wiggled, but that didn't make any difference, so I reached around for a scratch, and fvck me if there wasn't a piece of glass stuck in my date. Big fvcken bit, about three inches. It had gone right through the new Calvin Klein jeans my cheese had bought me for my birthday, right through my undies, and sliced me another crack. Fvcken blood everywhere. My mum reckons she can fix the jeans, but I chucked the boxers out. Big fvcken piece of glass. Right in me arse. Didn't even notice it had cut me. Fvck."
Student 2: "Yeah, really. Same thing happened to me about a month ago. Six stitches."
There followed an interesting conversation on arse related injuries. I suppose, when you think about it, with all the people going to all the bars in Straya, there must be a lot of people sitting on broken glass.