Right I was just flying my Phantom 2 with the hero 4. Gimbel with the typical FPV setup with the black pearl monitor. I am a novice drone pilot and I am also only 15, my battery had overheated and burned out on my monitor so I decided I should follow the drone closely and use the GoPro app on my phone to act as a mini FPV so I did. It was all very successful until the drone was getting low on battery but as a I was about to land it shot off into the air to about 150 foot high and started flying into the direction I took of from but I had no control over the drone so I chased it down the beach until it gradually decreed its altitude. I thought the drone was going heywire and had a mind of its own but I had a idea that it was returned to where I took off but I thought you could only activate home and do it manually but I did it autonomously so I was very confused can someone tell me what happened????