Yeah, if a flywheel breaks it's usually a little more catastrophic. My dad knew the guy who was the cause of a redesign on the floor of '57 Chevies after he got in one with fuel injection, wound it up and the flywheel broke. It laid a part of the floor pan over his foot and kept the accelerator pedal all the way down. Finally figured out enough to shut it off.
I had a friend with a '55 Chevy. We were cruising Van Nuys Blvd one night and he got into a race with a Nova wagon. He shifted into second and started losing ground, so he slammed it back into low (no synchro- it made quite the noise!) and pulled it up to whatever that Corvette engine would rev. Knowing about that exploded flywheel, I slid my feet back to the seat to avoid shrapnel. But it held. I don't remember who won that race, I was busy watching my feet.