A deaf dog showed off her sign language skills when she responded to a referee's hand signals on TV, going viral in the process. Sara Ruth Zirm lives in Maryland with her pup Dory, a cross-breed ...

The main officials include one referee and one umpire. The court is divided between them and they swap places after each foul involving a free throw penalty. And also after each jump ball decision.

Unless it's at night, in which case hand signals will be much more difficult to see. During the day, though, it's common for riders to use a variety of hand signals in lieu of (or in addition to ...