Have you ever wanted to kick a participant out of your class?

I feel awful about this...Out of my 10+years of teaching group exercise classes, this is the first time that I have wanted to kick a participant out. I have had a young woman come to my kickboxing class 3 times now with a group of friends, she clearly doesn't want to be there, but she comes anyway. She is disruptive (answering her phone when it rings, she stops and yells, "if she makes me jump one more time!", stands in the middle of the class with the biggest attitude and won't do anything). I swear, It's completely disruptive, and no matter how much I try to motivate her, she is the biggest Debbie Downer! Has anyone else experienced anything like this before?