I am at the 3rd floor in a 4 story medical building. I am in a hurry so I press the hall up and down buttons (because it will make the elevator come get me faster). The elevator runs up to the 3rd floor and the up hall button light goes out and the elevator doors open. I get in the elevator and press the 1st floor car call button and it lights up and the doors start to close. The doors get almost fully closed then do an immediate reopen. I wait a few seconds and the doors start to close again and get almost fully closed then do an immediate reopen again. This happens non-stop til I finally hit a 4th floor car call and the doors close, the up hall call cancels and the elevator runs up to the 4th floor. The doors open, close, and then runs me down to the first floor.