I tried running threw it, like you could if you're stuck in another person (When leaving or entering a house).
The green glowing HF is probably as you guessed, mine. I returned from 1 day of work to see this beautiful sight. The rest of the area is pretty much covered off, and as I'm not willing to risk any battery scents (Not that I even can break something), breaking fences is no optional choice. Trespassing scents however are a different matter as they can't summon people.
So basically what I am asking, is there another way to go threw this "passage" or am I just going to have to wait for him to destroy my hf and enter a cave which he can't even mine in?

(P.s: While I could take my chances to ask the guy to let me out, I rather not. The Three skeletons just merely 10 - 12 tiles above me don't seem like accidental victims to me.)