pretty hard in most cases to be able to see a pin has come out of the tow bar
so until the guy stopped and heard bang or walked back and saw it to ever know what was going on
second off that whole set up is pretty flimsy compared to mine
I have a cross bar support system between pin connections(car side of things) which eliminates the twisting and turning of the pins and my pins are large clevis style pins. (much heavier style) plus the spring style hood pin clips that are suggested here.also a wider tow bar mount end of which the pin slides through
this system can pivot up/down and sideways
