My wife bought me a Vision 2+ for Christmas. Couldn't hardly wait to get it In the air, stood there watching the battery lights during the charging process. Went for a 3-4 minute flight and all went well. Packed it up and and drove to in-laws. Decided to go for a flight and it started up good. When I throttled it up it tipped over backwards. I shut it down as quick as possible. When I picked it up one of the props fell off. I put it back on and moved to a concrete sidewalk for the launch. Started the bird up and only 3 engines ran properly, one would run but not at the right speed. I took the prop off the engine in question and then took the 4 bolts out of engine mount to examine the bottom of the engine. The clip on the engine shaft appears to be ok. Now I'm at a stand still and waiting on the dealer to check with DJI to see what the next step will be. Sorry for the long post, just really bummed. Today was beautiful and really want to be out flying!