Yep, we had it happen with a Detroit Diesel 396 generator. Damned thing came off it's foundation.
I was a kid, working on one of my Dad's company's WW vintage LCIs, with a pretty screwy multiple 6-71 Detroit array.
While "servicing" the thing one of our Carib types decided to fire it up without the airbox re-installed, and that sucker just went to high gain.
We made a hasty exit, and once we were out of that awful crowded space I asked the main protagonist to go get a towel.
I tossed the towel into the blower intake, and that thing came apart like a $10.00 suit.
GTC