Exploding tire.

A few nights ago we were just laying in bed talking when we heard this loud pop and then a fast hiss like air escaping. We immediately got up and started looking around for what it could possibly be! Nate's bike was sitting on the couch with only one tire (the other was still in the truck from his last bike ride...lazy boy) not his tire. My bike was in the kitchen behind the table where it has sat for a week since Nate replaced both tires. The back tire was completely flat!! It was the weirdest thing ever! There was no sudden change in temperature, it wasn't recently pumped too full. Like I said it had been sitting in the same place for a week with brand new tubes and somehow the back tire just exploded! It was a little scary at first until we realized that all it was, but still a little odd if you ask me!