please get some pics of the bike - and especially pics or video if the wrestling match takes place
maybe you can adjust his calipers so the pads are contacting the rim ... or purge some air from his tires ... drastic measures might be required lol
lol. I don't usually have a camera with me. And if a 125 pound man accepts a challenge to wrestle me, I have to wonder about his motivation.
I think I'll just try to wear him down if he comes on a longer ride. I might be able to drop him on that first climb on a better day.