That's the thing about tall bikes: The only rule is don't fall. Fortunately they're inherently very stable, but if the bottom of the bicycle gets knocked from beneath you by a car or something, it's bad news.
If you know how to fall it isn't impossible to avoid injury from 10m. You're right at the limit of where you need to be really fit and avoid doing it too many times though. There is the added complication of needing to fall away from the bike as well, landing on it would be very bad news.
That's really rolling the dice. 10m is (more than) enough for a fatality, if you get away without injury you're just lucky, especially trying to dis-entangle yourself from a falling bicycle.
That ladder is supported on both ends. Just to reach over while it is falling requires you to shift to the side it is falling away from accelerating the fall even further.
It would be like being astride that ladder rather than clinging to the side of it and then going over the top and then sliding down on the side furthest from the ground.
