i had the exact same experience, my preceptor taught by making fun of me when i made a mistake and said things like "well that will be the last time you do that" I am not an idiot i saw a change in her attitude towards me, and i stopped learning. So I asked to change preceptors, and my manager talked to her, it got worse!. So i went into her office and told her i was not lerning from her.... and the one thing that got her attention was when I said. I feel uncomfortable asking questions and that is dangerous. The first two weeks were uncomfortable but now I love my new preceptor, and I am doing well! It is HARD to stnd up for yourself, and especially when you are being bullied! You can do it I promise,,,,,,!!!!