TWO GILROY MEN WERE SERIOUSLY INJURED WHEN THEIR SEDAN SLAMMED HEAD-ON INTO A SCHOOL BUS IN WATSONVILLE YESTERDAY AFTERNOON. THE 28-YEAR-OLD DRIVER SHOT HIS CAR ACROSS THE ROAD ON BUENA VISTA DRIVE AND HIT A 31-SEAT SCHOOL BUS HEAD ON. THE BUS WAS CARRYING TWO HIGH-SCHOOL STUDENTS AND A DRIVER. THE BUS DRIVER SUSTAINED NO INJURIES BUT THE TWO STUDENTS WERE BADLY SHAKEN UP. THE TWO MEN IN THE SEDAN WERE TRANSPORTED TO WATSONVILLE COMMUNITY HOSPITAL AND A SAN-JOSE AREA TRAUMA CENTER.