I have little experience, so I clearly learned a lesson today. At a very low hover, less than one foot (trying to practice), twice I nearly flipped, and struck my prop against the ground long enough to get a warning (motor obstruction) on my display. I have no visible damage to the P3, props even look fine. I'm not going to re-use the props. I am concerned enough to send it in to have a check up and check out. Any thoughts on would be greatly appreciated.