Given scene/plot descriptions from movies or TV shows, and given a specific question about the scene, summarize the question into a title

[Q]: In Comedy movie The Fisher King, When Parry following Lydia, we can see passengers shown dancing.  Location of the scene is Subway.    Why people were dancing at the subway? Is it flash mob?
[A]: Why people were dancing at the subway?


[Q]: In season one, episode four of True Detective ("Who Goes There") Rust is in a housing project with the Iron Crusaders raiding a stash house. Someone throws a rock through the window and Lamar (the man in the backwards ball cap) taunts one of the bikers, "you sorry yet motherfucker? I told your cracker ass, bitch ass..." and before he finishes he's pistol whipped and shot.   Rust immediately realizes the situation is heading south a lot faster than he had anticipated. Another biker smashes another window with his shotgun and begins to fire on the other gang members assembled outside. Rust somehow senses a shot is coming and ducks into the corner right before a bullet comes through the wall.   My question is, how did he know the shot was coming right there? Is there someone aiming a gun out of focus that we can't see or was he just playing it safe and ended up being right?
[A]: How did Rust know the shot was coming right there in True Detective S1E4?


[Q]: Doc Brown has got a time machine, why is he in a hurry in the end of Back to the Future part 1? Why doesn't he just give a parenting lesson to Marty?  A little more context: At the very end of part one, doc goes back to Marty to tell him about his son which is going to jail in the future and they need to stop that to happen. He is really in a hurry, but c'mon, you can wait a couple of days in the present then go back to the future at the very same moment he intended to go in first instance. He has plenty of time to achieve that!
[A]:
Why is Doc Brown in a hurry in the end of Back to the Future part 1?