Potentially dangerous mistake in March RV Magazine

I watched folks do it in that order (Unhook,, watch Trailer roll toward lake. Try to stop it (Fail) thankfully there was dirt and the tong jack dug in and stopped it before splash. then they chocked and re-hooked repositioned and rechocked before unhooking again .

Oh if you do forget.. Grab the break-away brake wire It is not strong enough to stop the trailer from rolling but when the pin comes out of teh clothspin switch .. Brakes ON.