Had a unbelievable experience last night . Was flying my mini 3 pro over water in sport mode and just as I reached where I was located on the shore I released the throttle and as the drone slowed down it started shaking and fell into some long grass nearby . It was only a few feet in the air at the time . When I retrieved the drone (undamaged) I immediately noticed one of the left rear props and retaining screws were missing . Don't know if the prop came off just as I released the throttle or did it actually fly unbalanced for a bit over the water. Could it fly with a single prop missing ? Did'nt see it come off . Lesson learned - to check the tightness of the screws before each flight .Had changed over to Master airscrew props recently , dunno if this had anything to do with it. If it threw it just as I got to the homepoint then I'm buying a lottery ticket this week. Check your retaining screws folks .Pack a jewelers screw driver in your kit.