This once happened to me, thankfully for only a few hours rather than days. I woke up one morning to a fwipping noise in my ear, went to the bathroom to see if I could flush it out with water, and a spider just dangled on a line out of my ear.
It was strange, but not really scary. Jumping spiders are harmless to humans, and this one was only a millimeter or so big.
Maybe he was confused? Most people just try on sweaters at or near the rack, if they try them on at all.