Back in about 2001 I had a yard machine 17.5 hp 42" cut, it had mtd vari drive, had almost finished yard and was backing up, the cotter key came out of clutch/brake peddle where rod goes into vari drive, rod fell out and it went full speed backwards. Now here is where I lost all common sense, instead of simply turning key off to shut it down I reached down to put it in neutral, but instead I popped it into forward. The little lawn tractor went straight up and over on top of me, engine died then I smelled gas as it was pouring all over me. Luckily it didn't catch fire, it took me several minutes to get out from under mower. It didn't hurt me, but after I got it put back together from then on I worried the rod would fall out again. I was very lucky that day, it was middle of week I was home alone and all neighbors were at work, I had phone with me but it fell out of shirt pocket and I couldn't reach it :confused2: