[Stephen's read the books as a kid, forgot about them mostly, but there's some part of him that's getting a kick out of seeing something like this come to life.]

Extremely. And dangerous for the people around them as well.

[He didn't want to get into specifics, not that Holmes would believe him, but it was safe to say it could wipe out a good number of people.]

I'm assuming you have a price for your services. I can strike a good bargain.