Comment Re:I like my netbook. (Score 1) 300
I suspect he has poor riding technique, or is riding a fixie where form wins over function and a frequent failure mode is getting your clothing sucked into the chain line with no possible way of stopping the bike quickly, resulting in fairly horrifying and dramatic crashes with high potential for injury as a lot of rotational force with nowhere to go suddenly is transferred into your body.
I ride and race mountain bikes, and while crashing in those settings certainly has a high potential for injury, I've never had any issues from drivetrain failures; nor has anyone I've ridden with. This includes things like the chain falling behind the cassette and seizing the real wheel needing complete dis-assembly, chains snapping under power or falling off front cogs, and even binding on a derailleur cog resulting in snapping the chain, the metal derailleur cage, and the derailleur hanger clean off the bike.