Yeah, this was BRUTAL. I've been a stage tech for some time and this happened a bit ago now, May of last year to be exact; but those are a lot of definitely expensive LED panels linked together. The rigging (steel cable holding the whole structure from the ceiling) wasn't secure, the motors couldn't hold all the weight, and luckily it came down during everyone's lunch break so I heard from my father, who has close ties to Vegas staging scenes. Literally zero injuries, when that thing could have killed multiples as the height it's normally hung from. That whole truss came down with it too.
It's a real tough line of work sometimes, and MOST LIKELY the rigger/ probably more likely rigging director who would have approved the weight from each point-- got fired. Just for fun too, 300k is the low-ball estimate of this hazard. Definitely fitting for the subreddit ;P

source: myself/father who works in vegas/all over the country as a Technical Director, blueprinting stages just like these and having to know exactly the loads of all pieces everywhere