Be Motivated by not allowing THEM in your heart

I did a full day training a few weeks ago- I was the facilitator. Normally I get great responses from students who like my fun interactive style. Then I met "her" . When I asked each person what they would like to get out of the day ( I always do this) she said "Nothing" in front of the entire class.On the first exercise when I asked her group for answers they said " we dont have any."
It was not what she said that bothered me it was the vocal tone, hostility and cold dead eyes that were well, (I don't know how to say it) ,creepy and disturbing. She complained all day about everything.
Why do I bring this up?I made a conscious effort not to let her bother me and more importantly the rest of the class. People like this can get to you and destroy your energy and spirit. Don't let them! They are not worth your time and energy.Click ignore. Concentrate on the positive people. Don't let their " heart condition" affect yours. After all they don't deserve it. Today she is somewhere trying to ruin someones day but she didn't "win" with me I still had a great successful training class- with grateful students who told me they admired my spirit.