Tuesday evening, 8-09-16, Canada, near Winnipeg. I have 3 batteries. Accomplished two successful flights, both near 18 minutes each. Lifted off with the third battery Successful lift of up to around 80 ft. About 400 feet away. Lost total control of the drone about two minutes later. None of the options worked. It flew in about (this is guessing), 800 ft. l/h turning circle. I have noticed on the transmitter, I thought I caught a glimpse of a message of ''emergency'' It made three of these circles and noticing each pass it was lower and very close to me, maybe within 50 ft. away. Chased after it and found the drone, lights still flashing, fortunately, and happy because it was about 12 ft from a waters' edge, but the camera was gone. It appears to have struck a tree, from the direction I lost sight. I wish at least I had the micro sd card, with the awesome footage I acquired . Frantically searched the entire area. I think it's under water. Anyway, I'm trying to find out how this can happen and not return to home.