EE RUSHING UNDER CONVEYOR TO AVOID GETTING WET & HIT HEAD ON CONVEYOR FRAMEWORK LABELED LOW OVERHEAD. EE REFUSED MEDICAL ATTN AT TIME OF ACCIDENT. EE ON VACATION 8/28-9/2/13. ON 9/3, HE COMPLAINED TO MGR OF STIFF NECK/DIZZINESS. EE SENT TO CLINIC ON 9/5 & INCIDENT BECAME REPORTABLE DUE TO LOST TIME.