first time out with our Fleetwood, the trailer didn't seat right on the hitch, thank goodness we had just pulled off our main highway 403 and decided to go home the quieter less traveled highway 5, the trailer popped off our hitch - and slid to a stop under the back of our truck, the propane tank guard stopped it from taking off the valve, other than break the battery tie down strap and some bent chain, we were very very lucky - our first trip out could have been our last. we are now extra vigilante and double check everything before leaving the campsite, again at the gate, and once more on solid road. please be safe out there. we couldn't thank the good samaritans enough who stopped to help us get the trailer back on the hitch, I had called CAA and they were en route to us, but since the trailer's back end was still in a live lane, we needed help asap, 3 ladies (myself included) sat on the back bumper of the trailer while the men hooked it back up...i was shaking in my boots - the rest of the way home we crawled, both of us keeping one eye in the mirror, the other on the road. I never want to experience that again, we have since purchased a newer ball, and installed locking pins, and better chains.