I'm sorry, but there's a mechanic with a hand held under each wing tip, and hopefully under the tail. Their ONE JOB is to look ahead and up to spot potential hazards and call the truck and cockpit to tell their colleagues "stop". Heads are going to roll for this, and the mechs or coneheads have no excuses
Maybe .. just maybe .. one mechanic called out "STOP" .. and the call was just a few seconds too late .. or the response was just a little too slow coming?
You know, just like the old story about the top-class helper you get, when reversing your vehicle?
"Keep coming! .... keep coming! .... keep coming! ....
BANG!!! ........ STOP!!!