My wife does this, she will follow me around and criticize everything I do and belittle me. Sometimes I will tell her look just back off, go away but she keeps going and she has this glint in her eye. She knows she is pushing me until I snap and say something I shouldn't. I try to recognize what she is doing and let her words wash over me and through me missing my buttons, then I just look at her calmly and wait for the next barrage. She finds this infuriating I think. I have just recently learned this and I am not always good at it either.