No, that's not supposed to happen.
During Saturday's Nationwide Series 5 Hour Energy 200 at Dover, Parker Kligerman left his pit during the first pit stop of the day with the jack still underneath the bottom of his car. And, almost incredibly, the jack stayed underneath Kligerman's car for an entire lap before he made it back to his pit stall so his crew could remove it.
However, as Kligerman was exiting the pits, it hit front tire changer Mark Armstrong in the right lower leg. Armstrong couldn't continue and the team was forced to find a replacement.
Kligerman was also penalized for removing equipment from the pit box and was forced to start at the back of the field for the ensuing restart. He finished 11th.