Yes, this kind of thing happens in FPSC because there is collision issues. Small objects will go through solid walls if you throw them hard enough. Even the player will fall through the floor if he gets stuck in the right place, which is often with uneven floors and tight spaces.
I haven't had a chance to voice my concerns about this but it would be nice if this was fixed in an upcoming update. This error is sort of cool in the way your using it but it could be done with scripting and doing it this way is probably very unreliable.
If somebody from TGC was to look at this post, I would appreciate it if the player could either fit into a space, or if it is too small he couldn't. There should be no margin in the middle for the player to squeeze through halfway and then get stuck. Basically, it's "all or nothing".
I aplogise fr tge Abve. I mite hav mshpeled a cuple tings.