February 28, 1972 - George and Pattie are in a bad car accident. Thankfully they both survived and were about to heal from their injuries.
John, George, and Ringo have all been in serious can accidents that caused them to be hospitalized. Paul had his moped accident, but I don't recall any big car accidents for him.
Warning ---photograph of George hurt in the car accident with blood coming down his face. Stop scrolling if this might be too upsetting to you.