I grew up watching movies that depict the sound of a bomb dropping overhead like this:
Is that for real? I have never heard a bomb dropping over my head. Just curious how it would sound in real life.
This depends on the design of the bomb. Some bombs made whistling sounds, as explained in this answer on the History site.
Another famous bomb was the so-called "Buzzbomb", aka V-1 rocket, used by the Nazis, primarily against Great Britian during WW II. It didn't whistle, but did make a loud buzzing noise.