New user to Phantom 2 Plus Vision and this forum. Replaced an ESC because I did not power off the motors after meeting with a branch. Other ESC's and motors appeared fine. First flight, take off OK, advancing throttle, and once i got to perhaps 30% throttle, bird decided to increase RPM's drastically, on its own. I backed the left stick down to idle, and managed to steer the out of control bird into some trees. Motors were still racing when it hit the trees. I anchored the bird on the ground, and the problem repeats: slowly advance throttle, and at about 30-40%, motors speed up dramatically. Going to idle on the left stick slowly brings the RPM's down again. Love flying this drone, and hoping to get back in the air again ASAP. Any suggestions?