The arse roof was this car:
http://i.imgur.com/zSK5qqo.jpg[/IM]
[IMG]http://i.imgur.com/JGg9elS.jpg[/IM]
that was bought by a member of this forum, known as Gazza2 or similar. (I'm unsure if that is him in that pic.) Gazza2, elated with his new toy, created a thread and posted plenty of pictures to show off his new car. Someone replied with "Why is there an arse on the roof?" and basically Gaz lost it and went mental, gave the trolls plenty of food and it went nuclear.
However it did take a sorry twist in that someone vandalised his car pretty badly (keyed every panel of the car) and Gazza2 posted it here and elsewhere in the hopes of finding the vandal. I doubt it was a member of this forum responsible for the vandalism, but some of the responses were pretty reprehensible none the less and, personally, I think it went too far.[/QUOTE]
Whoever vandalized that car is a total buttroof...sorry I mean butthead.