Been there. Done that. At Ft. Knox on an M-48, instructing an AIT trainee-driver (the commlink was broken) as the tank slowly teetered on its tracks at the top of a small hill, then tottered over and we rode down. The main gun was in the locked position to the rear.
Those 47s and 48s didn’t have a lot of handholds. They were safer than the M-60 with the auto-decaptitate hatch, though. As long as you never hot-fueled them!
On the driver training range/ vehicle recovery area, where a newbie driver sped up going into a mud-filled waterhole instead of while climbing out of it. And I knew the hole was deeper than the driver's hatch, about halfway up to the turret. I bailed, and the gunner side track missed me by about a foot and a half.