[ That makes Gil laugh, a short but very genuine sound. ]

I was not kidding about that part.

[ Even if they've amply communicated the unspoken awareness that mostly he just wanted to hang out for a bit. ]

There's a number of substances here that don't exist in our world in quite the same form. Even though I expect my medicine to work, I'm not taking risks with your health.

[ As he speaks, he reaches into his bag yet again to produce a small black case containing his testing kit. ]