Now we are talking about raw horsepower:  this Amish horse team pulls an 18-wheeler tanker truck out of a snow bank!!

It happened in Pennsylvania, it seems that an 18-wheeler lost control and jack-knifed into a snowbank.  You'll see, in the video, that the horses' hooves are slipping a little at first, but then they find some gription and pull, seemingly easily, the tanker truck out of the snow bank.



(Via Youtube)