LOS ANGELES (CBSLA.com) — Jeff Johnson was on his way to work when his car broke down on I-5 near Griffith Park. Stranded along the median, his car was slammed into by an ambulance. CBS2′s Kristine Lazar reports why the ambulance didn’t stop: The driver was so tired that he might have fallen asleep at the wheel with a patient and a paramedic in the back.