[This idiot looks fleetingly guilty about it, because only Jesse Pinkman could look guilty about saving someone's life and curing their cancer. He avoids Walt's eyes for a second, which is an obvious tell. But lying is kind of useless, anyway. Mr. White will find out how his power works one way or another. Everyone else around has seen him use it.]

I, um... Yeah.

[He's quick to reassure Mr. White, though:]

It's okay. Really. I done this a lot. Um... I mean, not this this, but healing. Stuff. And I always get better after a little while. So - So cancer'll probably be the same, right? I mean, it's not even important, 'cause -

[He's back to smiling, because this next part is what makes it all worth it.]

- 'cause you got time now. Even if you're stuck here for a while. You got time to make it back to your family someday. You don't gotta worry.