She can't help it; she sucks in a breath like she just stepped on something sharp. His hap-hazard punch hurt just from watching it. She stands again and frowns slightly, trying to think about a polite way she could frame this.

"Well that's all wrong."

Okay how about honest instead of polite? She does look a little sheepish, though. "Watch me again?"

She resets her stance and does a slow-motion version of the punch, then looks over at him to see if he got it.

And also to make sure she's not offending him, although yeah that was ... something else.