Suddenly, my mouse pointer started moving around on its own. I rebooted, changed login password, and turned on firewall (and added one or two incoming connections). I'm using Mountain Lion on a Macbook Pro. I don't have any team-viewing software installed, that I know of. I also don't visit dodgy sites, that I know of. My mouse seems fine now. Should I be paranoid? Could that have been a glitch or a legitimate hack attempt?