This document lists several popular monster trucks and provides context about monster trucks. It lists the following top monster trucks: 106.7 The Fox Monster Truck, Aces High Monster Truck, Advance Auto Parts Grinder Monster Truck, After Shock Monster Truck, Airborne Ranger Monster Truck, Alter Ego Monster Truck, and American Guardian Monster Truck. It then defines a monster truck as a modified pickup truck with extremely large wheels, tires, and suspension that is used for competition and entertainment, often alongside other motorsports like motocross and tractor pulls.