to fall free
there's a point in a freedive where you have gone deep enough that the air in your lungs has shrunk to where you are no longer positively buoyant. After this, you can stop swimming and just enjoy the ride, let gravity take you down. We call that freefall. I'd say it's the best part of freediving.
Filmed in several cenotes in Mexico, under the watchful eye of qualified buddies - freefalling is not something you should do alone.
The freediver is Georgina Miller of https://www.aquacityfreediving.com/
The music is 'Momentum' by Pablo Suarez
Filmed on breath hold (and occasionally in freefall) by https://www.daanverhoeven.com/