My good friend had a cat once that HATED me. It never hissed at me but it would claw me all of the time. Whenever the cat would use the litter box my friend would laugh at her (please dont ask me why, i dont know) anyway the cat would finish it's business and run over to me and claw the mess out of me. Or if I sat too close to the bed while it was sitting on it it would run over and claw me I think everyone makes a lot of sence though, maybe it just associated me with a bad experience in its life.