Back in the day when rocks were soft, processors jogged at under 5 MHz and bits traveled at a leisurely 110 baud, I repaired Zenith Data Systems units. They had an 8-bit micro in an all-in-one case that ran CP/M. They also had an external 5 MB Winchester drive unit that was about the size of a countertop microwave (8" platters too!). If you sat in a wheeled office chair, powered one down and twisted it in your grip while the platters still spun (no autopark back then), the gyroscopic action would twist you on the chair.
I love these old stories. (no sarcasm) --It's like hearing of the good ol' days before nail guns!