[His eyebrows go up at that before he bursts out laughing, some of that drained energy beginning to replenish itself. The fire was good for him, too, invigorating; there's no odd sluggishness to his thoughts anymore. Harry will also come to discover that he's got a core of bitter anger equivalent to a nuclear reactor when it comes to clean but volatile sources of endless energy.]

Not throwing up any limits, huh? Anything at all? You can't expect an answer to an offer like that right away. [Still chuckling, he slides a hand over his hair and scratches idly at the back of his neck.] I'll get back to you on that one. As a general rule, though? Don't get in the way of my fun.

[A bit more flatly, with threatening gravity.]

Ever.