that was probably me, who had his trailer come unhitched last year... in fact, the ball came out of the stinger, the ball stayed in the trailer hitch.
It was a ~4000 lb
Escape 21 foot, being towed by a ~8000 lb F250 longbed diesel 4x4, I was on a rough 2-lane country road, highway 77 southbound through northern nevada, somewhere north of I40, late in the day. cruising along at 60-ish MPH minding my own business, and suddenly the trailer started whipping back and forth hard enough to push my F250 around some. one look in the side mirrors to see what was happening, 1-2 seconds to gather myself, reached down, and engaged the manual brake control lever, instantly the trailer stopped swaying, and as I slowed, I was able to modulate the trailer brakes so as not to burn rubber, and pull off the highway onto a gravel siding. got out, saw what happened, got on phone, located an OReilly about 25 minutes away that was closing in 40 minutes. quickily got the trailer on the jack, recovered the hitch, left my dear wife cleaning up the mess inside the trailer (*EVERY* cabinet and drawer had dumped on the floor, the
fridge door sprung open, food everywhere. amazingly, hardly anything actually broke.). thank god for crossed safety chains!
got to OReilly's, bought a crappy stinger (all they had), and got back to the trailer about an hour after leaving, wife was just finishing the pickup, so hitched up, and headed back down the road. ended up camping at a Walmart parking lot in Winslow,AZ that night because we were too frazzled to go much farther.
so yeah, I'll never tow anything above a sub-1000 lb boat without brakes. sure, I towed a Hobie 16 catamaran all over California without brakes, with both a volvo 240 sedan, and an econoline van, but the whole trailer weighed under 800 lbs.