Another of my odd dream bits...
I met a guy in the dream who had made a two seated, pedal powered, riding
lawn mower. The extra rider was for more pedaling power.
He had taken a basic riding mower, gutted it hard, then made the blades and wheels move by pedals. They worked off separate gearing, but it did it's best cutting when the wheels were going slow, as the blades were at their fastest.
Interesting concept!