Dick was a motorcyclist first, road, dirt or off road. If it had two wheels he was on it.
I may have told this story before but a few years ago (ok, it may be ten by now) we were at an AHMRA event in Southern Oregon doing the trials. Dick was checking at the end of the section. It was a steep sandy downhill to where he was. I was on my Bultaco and pulled the compression release to slow me down. Dick had such a grin on his face as I pulled up, "So good to see someone who know how to use that!".
Second story, probably second hand, about the Sandy Bandit ("infamous" British bike dealer in Portland) when asked about Dick Mann. "He could win any motorcross race on a pogo stick". Somehow I didn't doubt that.