Seems like alotta trailer for the tow vehicle

Certainly not saying you're wrong, but I'm having trouble accepting that if you're driving 60mph and at a given spot on the road you slam on the brakes to mimic a crisis stop, that you're going to be stopping in the same distance with the tow vehicle only or with a tow vehicle + long trailer that is likely close to or possibly over their limits. Just doesn't work for me.