Rubber band chrony challenge

This probably is best categorized as, "simple things please simple minds".
Testing the Shooting Chrony indoors with cheap Harbor Freight lights on the diffusers and a rubber band. It actually works fine. Then I wondered, how fast can I get the rubber band to go... It measures about 5 inches when flat, and I just used my fingers to shoot it. Anyone else want to try to beat the record?
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"DAVEFISHING"STUCK MINE FROM THE DOLLAR STORE UNDERNEATH . IN THIS HEAT THEY KEEP FALLING OFF WITH DOUBLE BACK TAPE. I'LL GIVE IT A TRY THIS EVENING. Got to get out to Ben Avery 7am now to shoot my Sporting clay's.
Mine have magnets on the back of the light. Using a magnet on top of the diffuser would hold them on the bottom.