Sierra is gone but Kenna won't let her go, she inflates her over and over, pushing the air back out and doing chest compressions and checking her arms. When mouth to mouth doesn't work Kenna uses a manual resuscitator to inflate Sierra. part two Now Sierra must bring back Kenna. Using mouth to mouth Sierra inflates Kenna making her belly and ribs expand like a balloon . She does this repeatedly then uses the manual resuscitator.