Why couldn't I towbar my fish to cruises or drags?

I towed a 68 Coronet Wagon 453.4567tenths 0f a mile from KY with a tow bar behind a 2004 jeep Grand cherokee!!!
My ***%$^& has not been the same since!!! I THOUGHT I WAS GUNNA DIE!! A THOUSAND TIMES
That Coronet WAGON would get to swaying and with the short wheel base of the jeep-(never mind the rain) WOW!! Made for an exciting white knuckle trip!!(but i made it and didnt kill anybody)
I dont ever want to relive that so its only a trailer for me