I was cutting with my 38" walk behind yesterday riding my single wheel velkey. I made a sharp corner and was heading up the yard on a small slope. All of a sudden my feet get planted in the ground and I do a face-plant just missing the control console with my head. The cotter pin on the knuckle that holds the platform to the connecting bar came out and the platform just stopped (dropped out of the bar). Didn't hurt too bad (just my ego) but when I looked up, the neighbor kid (and ex-student of mine) was laughing his A** off. You can bet I'll be checking those pins EVERY time from now on.