Well, hardly serious. "Er, Dad, I've broken an indicator on the bike...." Cue one smashed lens. "It's still working, though...." he adds, hopefully. So I ask how he managed it. Cue shuffling of feet, downward glances, in fact body language identical to the embarrassed shuffling exhibited by the monsters in The Internet Is For Porn vid. "I dropped the bike. I went too fast round a corner on the wet road." Heh. No further damage to the bike (dirt bikes are as close to crash-proof as you can make a motorcycle, IMHO) and he's directed to remove one of the other lenses and take it to the nearby Yamaha dealer with a request for "another one like that". He even replaced it himself. Tutorials in engine rebuilds start next week. I reckon that nothing improves one's riding, or gives a better wake-up call, than a bin (any bin, large or small) from which one emerges unscathed.