He's mostly focusing on holding his breath, at this point, instead of performing the Strenuous Activity of trying to flail his broken limbs.

RAW says:  2 x CON = 26 rounds, two and a half minutes of breath-holding.

After that, Constitution checks starting from DC 10 and increasing in DC by 1 each round, to keep holding your breath, which is a couple of rounds if Esta is lucky.

RAW says you suffocate to death 3 rounds after you start breathing water, but RAW doesn't have a concept of CPR.

He's mostly focusing on holding his breath, at this point, instead of performing the Strenuous Activity of trying to flail his broken limbs.

RAW says:  2 x CON = 26 rounds, two and a half minutes of breath-holding.

After that, Constitution checks starting from DC 10 and increasing in DC by 1 each round, to keep holding your breath, which is a couple of rounds if Esta is lucky.

He might not, like, totally get all of that, under these conditions.

RAW says you suffocate to death 3 rounds after you start breathing water, but RAW doesn't have a concept of CPR.

He's mostly focusing on holding his breath, at this point, instead of performing the Strenuous Activity of trying to flail his broken limbs.

RAW says:  2 x CON = 26 rounds, two and a half minutes of breath-holding.

After that, Constitution checks starting from DC 10 and increasing in DC by 1 each round, to keep holding your breath, which is a couple of rounds if Esta is lucky.

He might not, like, totally get all of that, under these conditions.

RAW says you suffocate to death 3 rounds after you start breathing water.