On long trips I always put locks thru the hitch latches so they can't come open. Today for a short 4 mile trip with the trailer empty to get it weighed, I didn't. Within 500 feet of the entrance to the scale location I hit a rather rough section of road at about 30 MPH. Just starting to brake for the turn when the trailer took a hop. Came off the hitch and down onto the tongue jack. Two bounces and about 30 ft of skid marks from the jack, we came to a stop. Breakaway didn't trip as the trailer tongue was never more than a couple inches away from the truck hitch. Jack got a slight bend and the 1.75 X 5" channal that it''s welded to also got bent. Figured the welding shop could straighten the channal enough to last the next trip north with a stop on the way south at the manufacturers to get it redone. He had a brand new one in stock plus the channal. $125 later and after a 3 hour wait, it was repaired. Lesson learned? Lock your hitch latch no matter how short the highway trip.