After completing an approx. 10-15 minute flight, upon landing my P3P started behaving erratically: - Note: Visual Positioning System turned off (some flights ago). - Flew for around 10-15 minutes around a farm area in comfortable flying conditions. Flight was normal. Battery around 40% with 3 charges. - Touched down for landing. - I was lowering left stick for stopping the motors. (You can see it start to slow down in the video) - P3 suddenly shot up in the air on it's own at high speed. I brought the stick back to upward / middle position then tried to counter it with downward movement. - P3 then started to descend rapidly (far faster than usual). I countered with upward movement. - This 'yo-yo' effect carried on for a few seconds. - Eventually it was like an added descent force against the stick. I was pushing up against it but it was coming down. - Once down it would not stop with downward stick motion. - Finally I got it to stop by cornering both sticks in lower middle position. Has anyone else had this happen to them? I've never seen this happen before on P2V or P3. I flew later in different places with out any re-calibration / change to the VPS and everything acted normal. One of those was a short flight on the same battery without recharging.