couldn't find a pic so I drew one up. yes, I've got mad MS Paint skillz yo. :D
the red is 2x2 tubing, the dots are holes for hitch pins, the orange is angle brackets on the 3x5 tube bumper, and the hinge point between the 2x2 tubes is a couple plates welded to one of the 2x2s. one pin dropped it to the ground (made for a nice step up to the 6" lifted bronco) and one more pin in the hitch freed it for removal. should be easy to elaborate the upper part with an angle like desert racers have. didn't help the rear departure angle though. :P