Didn't put the safety pin thru the boat hitch. Boat came off hitch going around 5mph shortly after taking it out of the water. Destroyed the fab-four bumper, I was really suprised. Dented the tailgate too. Besides my negligence, I attribute most of the damage to the poor/weak mounting brackets. In the third pic you can see how bent the passenger mounting bracket was. New bumper is 1.75x0.120in DOM. Just getting started but here are few pics.