Once delivered hay to an amish farm and buried the truck in their lane. F350 4wd dually, 24 foot gooseneck loaded with 9 1500lb round bales. Truck and trailer were in to the axles. The amish farmer brought out 2 belgiums that were so tall it looked like he could have walked under them. When I asked him if he wanted me to unhitch the trailer he said " naw, I have strong horses". Once he hooked them to the truck they sorted of leaned into the harness to test the load and then they started digging in, they were pulling so hard their bellies were 2feet off the ground, but everything started to move and off we went. On that day 2 horsepower was better than a powerstroke diesel!!! I was very impressed.