Vanilla is a product of Lussumo:
Documentation and Support.
Depends on their access to walkie-talkies, I'd guess, unless Kirk used his Freakangel talent in a subtle way to detect the intruders. (Which would be very cool, by the way.) That's irrelevant nit-picking though, and my point was that Mark seems to be poking them with a stick rather than going for any serious damage at this point.
Stay tuned.
One shot? Why only one shot? You can easily get three bombs in the air before the first one impacts. Someone's trying to draw them out
or a means of trapping them in the freakcave?! it did hit the entrance...
Or he knows exactly where the "FreakCave" is ...