I've had my Phantom for 4 days and it has been a blast. Unfortunately, I lost my first set of blades in a crash during a landing attempt. I have no problems at all with a very smooth landing, but the first time this happened I was in a slow descent and about 8 feet off the ground I let go of the stick to let it stabilize to go slower on the final approach and it just kept going. I froze and it didn't break anything from the initial impact, but tipped over and ate up the blades. I thought I had made a mistake, and just put blades on again and kept flying. Earlier today, I was descending toward a good place for a still shot and it did it again, only this time 30-40 feet off the ground. I pushed the right stick forward to avoid a house and it stopped descending after a few seconds. This happened again a few minutes later in the same flight. Finally, on final approach for landing, it did it again when I paused at 10 feet for a slower speed. This time, I snatched the bottom of the copter and held it until I could shut it down to prevent damage. What would cause these non-stop descents? Any ideas?