EE WAS JARRED AROUND IN TRUCK CAB WHEN HYD EXCAVATOR INADVERTANTLY BUMPED INTO THE SIDE OF HIS TRUCK BED ( TRUCK WAS BEING LOADED) EE NOTIFIED OPERATOR ON DEC 31 THAT HIS NECK PAIN HAD INCREAS ED SINCE THE DEC 1 EVENT TO THE POINT THAT HE DIDN'T FEEL LIKE RETURNING TO WORK.