Turn left and learn the rules.
Jammer A is serving a penalty when Jammer B is sent to the box. Upon returning to the track, Jammer A gets another penalty and is being sent back to the penalty box when the jam clock expires. What happens?
Both Jammers start in the penalty box and stay for their required penalty time
Both Jammers are held in the penalty box for 10 seconds then released
No Jammer starts in the Penalty box
Only the Jammer who entered the penalty box second must start the next jam in the penalty box