HP.-Many years ago it was determined that an average good horse could lift the equivalent of 33,000lb a height of 1" in 1min, which is the same as 33,000 ft-lb/min or horsepower.
A definition from the Refrigeration and air conditioning technology book. Not to bore you guys out. But that how it describes it. Hell, It even gives the definition of work.
Any way, cool videos.

01' TJ Wangler, 6" Ruff Country X Series, 35" x 12.5" Mickey Thompsons On 15 x 10" rims w/ simi Bead Lock, Matching Warn Bumpers, 9500xi Warn Wench, Tom Woods Drive Shaft And SYE, And A K+N Cool Air Intake. Still Improving