Harry's hands have shifted to Charlie's, defensively trying to get him to let go, and at the crack of the gunshot he turns a startled look towards Chloe. Well, mostly startled. There's a fogginess to the expression that tends to come with getting your brain jostled.

He lets his grip drop when Charlie pulls away, and the pain's more a creeping factor for him as the numbness wears off. It'll be worse tomorrow, but it's just a headache at this point, really - though admittedly one that feels a bit like a train rattling around in his skull.

"Nice of you to join us."

Goading the angry woman with the gun, the obvious choice. It's meant entirely as a joke, though, and maybe a sly thanks.