Guy at our field today lost his 109 due to a exploding spinner, it was the planes fourth flight and he was still breaking in the motor. New plane with new seirra retracts stuffed/unrepairable and he will be giving cmp an earfull, all was caught on video camera as well. Luckly no one was hit by the flying plastic, we found about 12 pieces of the spinner all over the airstrip and upto about 50 feet from where it exploded in mid flight over the airstrip, never found the prop.