I meant to post this here. but how do you know when someone is faking an injury?

There's this girl at my theatre camp who supposedly has an injury and couldn't do a stage combat scene that she and her partner had to make up. Later on at lunch she was doing some of the fake punches that our stage combat teacher taught us. Now that makes me wonder, does she really have an injury? I don't really know what kind of injury she supposedly has but if it's that bad that you can't work on a fighting scene for class, then you shouldn't try any punches afterwards. There was also this kid in the class who had a burn on his arm, but he was still able to do the fake fights and whatnot. Have you ever experienced something like this? If so, let me know.

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