EE WAS USING OVALITY BEAM TO MEASURE KILN #1 1STTIRE TO SHELL OVALITY WHEN THE OVALITY BEAM HIT A LOW HANGING PLATFORM ABOUT 3' UPHILL OF 1ST TIRE. THE OVALITY BEAM MAGNETS BECAME DETACHED AND THE DEVICE FELL. EE ATTEMPTED TO CATCH IT & THE IMPACT OF THE DEVICE STRIKING HIS HAND CAUSED A LACERATION TO THE PALM OF HIS LEFT HAND.