P!N20 wrote:Or it just leaves the chain on the inner ring and you keep happily riding along. Catastrophic.
Probably the most ludicrous one listed there! Plenty of them do stretch the bounds of credibility but are theoretically possible.
Most drive train slips and jams don't throw you magically off your bike. Though if you are throwing your bike around it can increase the likelihood.
Proper drivechain jams are really only likely if you end up with your chain caught between the rear cassette and the wheel. Which could be quite ugly at high speed but when I've experience it I've never come off. Personally I've lost count of the tens of thousands of drive train slips both due to rough conditions or a less than perfect drive chain. (These sorts of things are normal on any well used kids bike or an old clunker city bike.)
I've been doing bicycle 'maintenance' since before I was 10. I won't claim I always knew what I was doing. I certainly didn't know what torque was let alone a torque wrench. It is odd that none of those catastrophic events occurred.