[Mohinder is hit with the certainty that he'd just made a huge mistake. Sylar understands far too much, and that meant what Mohinder had just done was closer to a confession than some scientific explanation. He can feel the heat rush to his face, but it's too late now. The cat is out of the bag.

He steps out of the car but hesitates to rush to the briefcase in the trunk- as much as he might want to.]

Sylar, I can't just jab myself with an untested cocktail out in the middle of nowhere. I don't have the equipment to take my blood beforehand, and definitely nothing to analyze any changes. Not to mention, this is hardly sanitary. I haven't finished the initial tests, either, and it's clear I'm missing some small component. It may be accounted for in the course of the changes this serum would provide, but right now that's totally unknown.

[A lot of words to try and cover up the fact that he really, really wants to try it. And here he can practically feel the devil over his shoulder now- a grinning devil, nonetheless. He lets out a sigh.]

The only reason I synthesized the thing in the first place was some misguided notion of being able to handle you if you showed up at my door again. [He glances back to the man.] Clearly, that was a fantasy.