Her stomping is so violent that it causes the light fixture in my bedroom to vibrate. I have noticed that she does this only when she realizes I am home. If she doesn't know I am home she walks normally. Moreover, over the past few weeks, on a nightly basis, she has starting stomping and dragging something across the floor between 1.00 and 4.30 a.m. which disrupts my sleep and is beginning to impact my work. For example, on May 6, 2012 I was awakened 3 times by her stomping and dragging. The first time was approximately 1.30, then 2.30 then 4.30 a.m. Consequently, the following morning I overslept and was late for work. On two separate occasions I have yelled at her to "knock it off" to which she effectively responded by becoming more menacing and stomping with greater frequency.