Real hospital CPR is eerily calm too, actually. There’s no frantic screaming of random adrenaline medication names and bogus doses. No defibrillator is hastily setup next to the patient. There’s no aggressive ECG beeping. IRL the whole ordeal is done calmly and almost in silence. It does calls all the doctors available to the patient and everyone self appoints to a specific job, one install the breathing pump, another monitors the pulse, a third prepares and administers medication if needed, nurses walk family away and set up curtains around the patient, etc. They take turns on compressions every minute and a half or so because properly done CPR is physically tiring. The time is kept by the most senior doctor who decides the time to stop and pronounces the dead after a set amount of CPR time without patient response. You either come out of it or you don’t. There’s relatively little drama involved.