Police chase driver in hospital
Of course, the police didn't chase a driver in a hospital, like some wacky action movie sequence. The subject of the headline is "police chase driver," a compound noun pileup typical of headlinese in the UK and other countries. The driver had "led police in a 150 kmh chase in Lower Hutt" and landed in the hospital after crashing (!) into a power pole. We await the inevitable followup headline, "Police chase driver out of hospital."