Once when I was helping a friend to exorcise a haunted house, the spirit of a dead cat started hanging around my energy field. Lucky for me, my friend was able to pick up this ghost cat energy and throw it out the window. That was his version of exorcism.

Supposedly when a ghost hangs around your aura it imprints parts of its personality traits into your energy field. This effect lasts only for a brief period of time. I don't know if this is true, but it is a fact that when I went to a Chinese restaurant the next day, I ordered fried mice.