I really really hope after joker stabbs her brooklyn style, he throws her off a 20 story building and start laughing like the homicidal maniac that he is. I also hope while she's falling in the air the joker shoots her just to make sure she's dead.
I never heard that phrase, 'stabs her Brooklyn style'. Interesting, I'll have to look that up.
I don't have it in for Rachel the way you seem to, but I certainly appreciate the Jokerish glee involved in shooting someone you've just thrown to their death. When asked why he shot a woman who was going to die in the fall anyway, Joker might say "Just couldn't stand the suspense." Audience laughs. Audience feels guilty about laughing. Audience wonders if Joker has judged them and found them guilty. Seems pretty perfect.