Snow Frostflame

there is a ghost in my house and he is really starting to get annoying it is the ghost of my step uncle, my step mom said to him before he died to watch over her children, everyone in the house is asleep and all the sudden my door starts shaking I thought it was my brother trying to piss me off but he was out cold asleep so it happened again and I went into the hallway and I said quietly "piss off" now nothing has happened.... yet