Actually, lobster is most closely related to cockroaches. If you have no problem dispatching a cockroach, you should have no problem dispatching a lobster. The difference is that the lobster is larger and tastes delicious.
Alt text: "As best as I can tell, I was transported here from Earth Prime sometime in the late 1990s. Your universe is identical in every way, except for the lobster thing and the thing where some of you occasionally change your clocks for some reason."