Occasionally when you spin around inside the light tower you fall through the wall or stairs.
Falling through stairs: http://youtu.be/U-87rlbMh7M
Going through wall at the end: http://youtu.be/LMASg9uesaI
Mass closing ancient tickets with no activity for > 12 months; assume fixed or too trivial.
If this issue is still relevant in current dev build, please re-post.