Down in houston, I had a co-worker that everyone called the Ninja. he would literally be sitting there, talking to you, and then if you blinked, he would disappear for hours, then re-appear and start talking to you EXACTLY WHERE HE LEFT OFF!!!! it was creapy. He'd take 2 hour lunch breaks and 1 hour break breaks every day, and the @#$%^& management ******* never caught him at it