As the title says, my rear tire blew out while my bike was just sitting in the office. The guy sitting closest to it had to change his undies i'm sure, it was pretty loud.

The only thing I can think of that caused it was too much air (I pumped it up to the max before I left home), then going from cold outside (cold for l.a. anyway) to a warm office = expanding air in the tube. It sucks, but i'm getting pretty proficient at changing tubes..