Transcription
Your hands and legs [music] are tied together before you jump into the deep end of the pool. And using controlled [music] breathing, you would bob up and down 20 times.
After that, you have to swim across and back like a dolphin. At this point, the strain on your lungs becomes physical pain. And one wrong breath means failure or even death.
To end the test, grab a scuba mask from the bottom with your teeth and bring it back up. If you succeed, you've passed.