It seems a whining sound effect was added for falling from any height higher than your big toe.

I thought I had wound infection at first, but had not bandaged making me check my server thinking I had a hacker it was happening so often.

Literally jumping in place causes the grunt to be played.
This is extremely annoying, and with the way the player model literally trips over the entire world it will play constantly. I first noticed it while running through grass and thought I had gotten wound infection from a new bug.