"Hey!" he protests to her assault, bending his elbow over his mouth since he's assuming this thing is airborne. Once the moths are gone, maybe they should air the place out? He's not totally sure of the procedure here. Thinking fast (or drunk,) Frank grabs the stick he'd been using to stoke the flames and lights up the end of it instead, so that when the moth is attracted to the flame he can light up its wings. It looks cool as hell for a second and then it slams to the ground where Frank crushes it under his boot. "I'm not laughing at you, I'm just glad this isn't permanent."

If he were soberer, he'd probably realize she has no hope of following along with his lame half-explanation while she has these significant gaps in her memory, but here they are.