Other mistake: During "Cool," there's a shot where they're doing a sort of knee turn, and you can see Tucker Smith in the background spinning too many times (you can see him start to stick out his arms to stop himself). (01:58:20)
Other mistake: When Anita sings, "and the natives steaming" her fingers get caught in the fringe of her dress. (00:50:05)
Other mistake: In the prologue, after Riff stands up and signals to the other Jets to follow him, they all stand up, then in the next shot you can see Baby John stand up again.
Other mistake: During "Cool," Baby John spins around and when he stops with his arms spread out, his right foot stumbles a little. (01:58:15)
Other mistake: During the dance at the gym, Maria doesn't snap each time she should have. Natalie Wood was unable to snap, so it was dubbed (as well as her singing, which was dubbed by Marni Nixon).
Answer: Actually there were a number of changes made in the movie adaptation compared to the original stage version. There were cuts, new additions, and changes to music, lyrics, dialogue, and characters. A few of the musical numbers were switched around because it was felt the storyline flowed better on screen, for different reasons. Some examples are "Gee, Officer Krupke" and "I Feel Pretty" which are cheerful, light-hearted songs and were moved to before "The Rumble", and "Cool" was moved to after "The Rumble" which gives that song's lyrics gravitas.
Super Grover ★