He shakes his head in wonderment. A lightning strike, hm? "I'm afraid I have little experience with lightning burns, and still less with chakras. But if what you say is true, and a blow to your back in the same place will help..."

Thorongil is willing, cautiously willing, to do it.

He steps forward, dropping to a knee (he's waaaay too tall to do this standing up, the guy's like 6'6" and Aang is, what, 5' max?) and resting a hand on Aang's shoulder. He places a fist against the burn, getting a sense of where it is, where to aim.

"You're sure?" he calls up, checking one last time. Aang has one last chance to back out.