Sexist comment - I was in a training class recently taught by my immediate supervisor.
I was the only female in the class and after I answered a question intelligently he looked at the rest of the group and said, "see guys, the one who does dishes understands science." It took all I had not to get up and walk out (of the class and maybe my job). Where do I go with this? Unfortunately the people above him probably won't understand and tell me I'm being petty.