my day wasnt as exciting!I have a self drive push mower I bought new bout 16 years ago,every few years I strip and clean regrease its wheel hub drive mechanism,has a steel drive gear with a bronze bushing!be nylon (plastic) these days?the wheel hub teeth are still good,and the classic briggs 190cc side valve motor still fires first or 2nd pull with no smoke,gets a yearly oil change castrol rx diesel,this is a Victa mower,very old aussie brand,I put a new drive belt and actuator cable on it few years ago,been trouble free otherwise,I hope to get another 16 years out of it.