Lots of stories like this
Stories of 14 inch spinning aluminium discs careering across computer centres were common back in the day. Usually seized bearings shearing off shafts and other things. I've heard them often enough to think they are largely apocryphal, but who knowns.
The exchangeable packs I was familiar with rotated at 3,200 rpm. Most certainly they packed a lot of rotating kinetic energy when spun up.