If you have some sort of echantment granting you protectection from falling (Protection IV +Feather falling on boots works well) and you fall from a height that if you did not have the echantments would cause fall damage (not counting landing in water - but it might play there and get lost in the splash sound...), you do not take the damage but the sound of hitting the ground hard and the camera jerk animation plays.

Expected: No damage?, Then No sound or camera jerk.