In the video, he isn't false grip, you can clearly see his thumb is wrapped around the bar.
As disturbing as the drop was, it is even more disturbing to see how unprepared the spotters were for something like that. The one on the left wasn't even prepared for a mistake. It is such a shame that he lost his life, prayers go out to his family. I hope this sheds some light on how important spotters are for these attempts, and it pushes home that they need to be trained to be able to spot.
485/335/585 @ 198
179 @ 85
"No citizen has the right to be an amateur in the matter of physical training.... What a disgrace it is for a man to grow old without ever seeing the beauty and strength of which his body is capable."