Last Sunday morning in Toronto there was a huge explosion at a propane storage depot which resulted in two deaths and 12,000 people being evacuated.

The dramatic mushroom-shaped fireball lit up the night sky and was filmed by several Toronto residents. A search on YouTube finds over 300 videos of the explosion. So far, so Web 2.0, but several of the videos are not quite what they seem.

Two in particular appear to show a group of people chatting in a hotel room who then hear noise outside and rush outside, while filming, and catch the explosion. The two are among the most viewed clips of the event and are from two well-known YouTube artistes.