Just saw that. Close call indeed.
The guys in the bucket lift are lucky too. Those things sway enough all on their own. Drop another 300 pounds of clock on them, and that could be long ride down for those guys.
I wondered if it was fake for a minute too, but I don't think so.
Watch the fork lift get thrown to the left at about :33, and the way that the guys in the yellow shirts react. They weren't watching him, and they scramble when things start crashing down.
It looks like the legs of the shelving racks weren't bolted to the floor, and get kicked out when hit by the forklift and the subsequent shifting loads. I still think they shelves weren't put together correctly, and were overloaded.