Continuity mistake: During the fight between Kong and the dinosaur, the shape of the tree Ann is on differs between shots.
Continuity mistake: Kong shakes the sailors off the log and a man falls down. A shot later he's back on the log. (00:53:12)
Continuity mistake: When Kong lifts Ann from the bed she is wearing a short dress. In the close-up the dress goes way down to her ankles.
Continuity mistake: This happens in King Kong's death scene. After he puts down Ann for the last time, he is shot and his right arm goes limp. In the close-up, he's suddenly using that limp arm to hold on to a spire.
Answer: It's never shown or explained, and the film uses a broad "suspension of disbelief" premise. The audience just accepts the characters were able to somehow transport a huge ape to New York City.
raywest ★