We can only assume this Canadian fire truck is rushing to put out a 4-alarm fire in a doll house.
YouTuber thespadeinator explains the video, thusly:
The vid was taken yesterday (May 22, 2012) in Nobleton, Ontario, Canada. I was sitting on a friends lawn and heard a siren. I thought...what the hell is that siren coming from? Is there an emergency? And got up to see that ridiculous thing booking it (*sarcasm*) down the road. My friend says that it is a legit firetruck, but what could that thing honestly do to a fire? Make it laugh itself to death?
Diminutive though it may be, it's certainly being driven by one of Canada's bravest, and we salute him nonetheless.