The shallow part is 4 feet. This depth makes the flip turn easy and possible. The pool is deeper, 6 feet, than Jing's height 5 feet 9 inches. In this Worthington pool, when Jing makes turns, Jing knows that he will not hit the bottom of the pool. Therefore, he dares to make the turn.
Batman: The Animated Series. Episode: Joker's Favor. Dr. Harleen Francis Quinzel, also known as Harley Quinn, first appeared in the Batman: The Animated Series episode Jokers Favor (episode #022, original air date: September 11, 1992) where she served as a humorous female sidekick to the Joker.
Harley is mentioned breifly by the Joker but never appears in the movie. Yes, Harley is a major role in the movie and helps Blackmask with capturing the Red Hood. Harley is in the movie once or twice, although they never really get into their love life. No, she isn't in the movie at all.