Well in the OTR circle its referred to as a "HIGH HOOK" and all the companies I have driven for a High Hook is a termination event! Not a warning,, you High Hook Your GONE!
Also,, Its a FONTAINE not a fountain.
But what would I know, only been at it for a few dozen years!
I'm sure you've seen a good bit of events like the video posted.
thanks for the spell check. Some times my one finger can't type as fast as I can think.....and other times vice versa.
Both companies I sub'd LTL work through and the one loading yard were a bit more liberal. They didn't send us down the road for a high pin ....high hook....high hitch event but did if the trailer was dropped. A good tug and close visual were required though if you wanted to keep your job.