Your answers were awesome, but I'll go with Brit and Vega's answer of a sonic boom. There was a airshow this weekend. Although the show supposedly ended Sunday, maybe some of the planes were leaving in fashion. I personally liked what my dream came up with... it was a metorite that impacted somewhere in the middle of the desert, and now there is an 8 legged mutant camel making it's way to Doha.

The end