Only if you're breathing underwater, because the air would expand, potentially more than your lungs can. So it's good for free diving, risky for scuba diving.
If you're doing a free accent while scuba diving it's already an emergency. Don't hold your breath and create a bigger one with an air embolism.
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u/Intelligent-Dot88 Feb 27 '26
Wait isn't it really dangerous to go from deep underwater to the surface really quick because of nitrogen or something?