While I agree he knows a lot for his age and his background, it does not imply he is completely correct.
I am not intended to undermine this FA, but just want to say a few words.
人流失咁多血，脈搏一定會低 => the other way round, when someone has bleeding, the pulse should go up but not down. High pulse rate is one of the signs of active bleeding.
因為他有氣胸，即使 release pressure（減壓），都減唔到個顱內壓 => it is not a reason of not to decompress the pneumothorax. Pneumothorax impairs cardiac output, resume circulation is the first priority in current ACLS (CAB). Brain is D, disability. Without correcting Circulation, Airway, Breathing, there is no point to correct D, i.e. the brain. With impaired circulation and breathing due to pneumothorax, the brain is not well perfused due to high intracranial pressure, systemic hypoxia due to breathing problem further aggravate brain hypoxia. In addition, high intrathoracic pressure impairs cerebral venous drainage that aggravates high intracranial pressure.
To decompress a pneumothorax in someone that is unconscious, a low cost ballpen can do the job.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2550436/
