Riding on a bicycle from the roof (don't ask) leaves you floating in the air

### Describe the bug

Aside from what's in the title, bicycle is placed underground, not on the ground.

### Steps to reproduce

1. Somehow get a bicycle on the roof of some building.
2. Additional: put your trusty dog in a wire basket - in the name of the science, of course!
3. Make a clear path by smashing the gutters (if applicable).
4. Ride the bicycle and move to the edge of the roof and beyond.
5. Observe bicycle has fallen down to -1 z-level (the soil level), and that bicycle is mostly undamaged.
6. Observe you're floating in the air, despite message log says `You fell down a ledge!`.
7. Observe your trusty dog has fallen too.

### Expected behavior

1. Bicycle should fall down to the ground level, like all other vehicles do (at least when I tested the same situation with a car, it correctly landed down on ground level).
2. Bicycle should take "normal" damage from the falling, like all other vehicle do.
3. Player character should fall down too.

### Screenshots

Starting disposition

After my bicycle (and my dog) has fallen down

Location of bicycle

### Versions and configuration

Windows 10 x64, 0.F-8389.

### Additional context

_No response_

No source files or tests are named in the issue. Reproduce the roof-to-ground bicycle scenario, then compare the bicycle result with the reported car behavior; done means the bicycle, rider, and dog reach the ground level and the bicycle receives normal fall damage.

Written by the indexing model from the issue text.