Regarding your 1) Easy peasy! Imagine accelerating out-of-saddle (Wiegetritt) from around 45kph to intended 55 to 60, to get through an underpass fast, to get ahead of traffic, because wanting to cut the sharp curve at the end and have enough speed for effortless uphilling.
Crunch-Bang! Got my handlebar including the stem painfully into my chin. Guess what?
Astonishingly (to myself) I did NOT fall, but managed to wobbly and swayingly brake to standstill, by the still attached brake wires, evacuating to the small sidewalk, and pushing it out of the underpass.
I think it was a good thing to be ahead of traffic, and not between/beside it in that moment.
Even more funny, at that time there was a large bicycle store only a few 100m away, so I got a new stem in about half an hour, while calming down a little ;>
2) Yah, thats ugly. Almost tore up my ankle that way, but luckily it was only a deep cut, which took 2 to 3 weeks to heal.
Crunch-Bang! Got my handlebar including the stem painfully into my chin. Guess what? Astonishingly (to myself) I did NOT fall, but managed to wobbly and swayingly brake to standstill, by the still attached brake wires, evacuating to the small sidewalk, and pushing it out of the underpass.
There https://maps.app.goo.gl/D26VGpXXZ3TJmbGTA from left to right.
I think it was a good thing to be ahead of traffic, and not between/beside it in that moment.
Even more funny, at that time there was a large bicycle store only a few 100m away, so I got a new stem in about half an hour, while calming down a little ;>
2) Yah, thats ugly. Almost tore up my ankle that way, but luckily it was only a deep cut, which took 2 to 3 weeks to heal.
Otherwise? Torn chains, mostly.