Euclid lost it's brakes as it was going up the ramp and started rolling backwards. It hit th ebig rocks being used as a berm. A tire blew out as Euclid hit another rock and came to a stop. Driver was still in the vehicle, turned the motor off and put it in gear. Got out, walked up to the top of the quarry, then was taken to dr. Only bruises shoulder/leg. Was wearning seatbelt.