My brother rented at tractor two weekends ago to muck out a stall.
Then he moved up the hill to move a pile of dirt.
Two hours in, he shut it down to take a break and the tractor started pissing hydraulic fluid. It hadn't leaked until it was shut off.
That ended our weekend fun with the tractor.
Lessons learned prior to this adventure were to always get the insurance when renting a tractor. Break downs can be pricey.