Oh man, I've got to learn that me and my friends' sense of humour is a lot darker than regular folks.
So I'm in a meeting and we're discussing asbestos safety regulations, and someone mentions that the iron girders in the World Trade Centre were coated with an asbestos spray to 'prevent heat damage'.
"It didn't work." I deadpanned, only to be met with fifteen seconds of silence and mouths gaping open in shock. The meeting then continued as I sank slowly under the table.
Sigh.
This is a 
Most of my mates would have died laughing at that. You know, some people just fail to see the funny side of things. It's wack.