Her embarrassment was rather fetching, and he couldn't help but to smirk a bit as he helped her to stand. He looked down at the rock, then at the knee, bending down to get a better look at it.
'I could heal that, if you need it,' he offered. After all, no self respected Auror could survive without knowing the basics in healing spells. Though sometimes it helped to have someone else do it for you.
'Or if you prefer I could blast the stone into oblivion, or turn it into a flower or something equally harmless,' he added with a wink.