EXITING SHOP THROUGH ENTRANCE DOOR. EE TOPPLED FORWARD & TO THE LEFT, FELL DIRECTLY TO THE GROUND & LANDED ON LEFT SIDE. AFTER HE CONTACTED HE BEGAN TO CONVULSE (APPROX 10-20 SECONDS). DID NOT APPEAR TO LOSE CONCIOUSNESS & WAS ALERT & AWAREOF HIS SURROUNDINGS AFTER THE CONVULSIONS STOPPED. EE HAS A HISTORY OF KIDNEY DISORDER & WE FEEL THAT MAY HAVE CONTRIBUTED TO THE DIZZINESS.