Thanks Johno...

Actually, what happened was my brother in-law tried pulling his foot straight up as opposed to twisting to the side, causing the back (pivoting) clamp to jam at a 90 degree angle. Darn thing wouldn't go back to it's original setting.

After an hour of working it, I did get it to reset, thus solving my problem. I think I'll continue using them for awhile.

55/Rad