There is no reason for the main character to be wearing a soft collar: either he somehow broke his cervical spine and would need to wear a hard collar or only suffers from a sprain and studies have shown that a soft collar does not help recovery.
A trauma to the nail can result in it falling off as shown. but not with such a change in aspect (as if infected by a fungus) and in such a short period of time.
The daughter tells her dad that his cheek is swollen. There is no sign of swelling on either his cheeks despite the trauma he just underwent.
As a well-paid man's home the wall papers are poorly fixed and the daughter's door slams clearly in studio's cheaply made walls.
A physiotherapist trained in CPR would know that the sternal thump (hard knock on chest) should only be performed once at the very beginning of CPR and would focus on mouth to mouth ventilations and chest compression rather than repeating this almost obsolete resuscitation technique.
A physiotherapist trained in CPR would start by two ventilations (mouth to mouth) when facing a patient in cardiac arrest secondary to respiratory arrest.