Wearing a jacket during cardio boot camp class

There's this woman who joined our cardio bootcamp class. She was heavily dressed; that is, she had a thick jacket on. The rest of us were doing jumping jacks, high knee raises, lunges, and other high-intensity activities. She tried to join in, but could barely even throw a punch.

Now, I don't mind that she couldn't keep up; after all, everyone has to start somewhere. I have to wonder, though... if she had such a hard time performing these movies, then why didn't she at least take her jacket off? You'd think that would have been the common sense thing to do.

Ya just have to wonder about some people.