I bought the dji phantom V2+ about 8 weeks ago. Flew it about 10 times with no issues. Yesterday I was taking photos of a friends house. Altitude varied from 30 - 120 feet. Had flown for about 10 minutes and photos were excellent. I was hovering at about 60 feet deciding whether we were finished when suddenly all 4 propellers blew off the copter and it plummeted to the ground. Totally destroyed. Dealer says he has never heard of this, and it is not really possible. (Well it happened to me.) Anybody got any ideas ? I have lost confidence, and am afraid to fly again.