DT: CALLER'S SON WAS GETTING OUT OF VAN AND WITHOUT WARNING THE AUTOMATIC DOOR CLOSED ON HIS HEAD. CALLER SAID IT TOOK A LOT OF FORCE TO GET THE DOOR TO OPEN. THE MORE SHE PUSHED THE HARDER IT WAS TO OPEN DOOR. SHE BELIEVED HER SON WAS UNABLE TO SET OFF SENSOR TO STOP DOOR. HER SON WAS ALMOST 4 YEARS OLD ,AND WAS A BIT SHOOK UP.UI*AK