Wh- holy shit, can she see him? He pulls back, just as startled, and it's only then that he notices the flour swirling around him. Wait, what? He reaches out for it experimentally and it falls through his hand and his fingers. He can't catch it - it doesn't stick to him. All he does is displace it.

Okay so how the fuck is he supposed to make her keep knocking flour clouds up?

He raises a hand and tries to wave gently, not sure what the hell else to do. He'd like to hope the motion is at all understandable, but as the flour settles it becomes harder to make a clear shape.