I think everyone who uses or used a trailer in the past has some sort of a "oh Phuck, stupid me" story to tell.Well that just reminded me of another stupid human tricks story. Moving houses (20 yrs ago) I had a 4x6 trailer modded to 4x8 (Not by me) with 2 extra feet out back. Put all 8 snows on rims at the back furniture on the front. At the new house unload all the furniture then decided to unhook the trailer and heel it up the driveway to more easily unload the rest. Stand over the tongue knee on it to unlatch. Not only did the trailer come shooting up it came forward. Bumper and hatch lid damaged plus a solid 5 plus minutes of whimpering like a little girl holding my bits lying on the ground.
I once forgot to lock put the lock pin into the coupler. Luckily I was just turning the trailer around on my street.
Thankfully the chains were still on as it could have turned into a run away trailer. ?