First of all..sorry for my poor english.. It was the weekend so i have plenty of time to fly around with 3 fully charged battery pack. Everything when smoothly as planned, outdoor angle, indoor angle. Done! went back home to check the footage and damn i forgot to take off the ND filter off when filming indoor and footage is underexpose. Fully charge the 3 battery pack again and went out for 2nd indoor take. As what i usually do when flying indoor…do all the pre-flight check list, flick the flight mode to A-Altitide and off we go. It was drifting around which is expected when flying in Altitude mode. Flew the quadcopter around to check for view angle and as i was so hooked on viewing the video feed on the DJI GO app..the quadcopter drifted ever so slightly backward... then BANG! it hit the glass lift structure and chipped the propeller. It then dropped 15 feet to the ground and landed on the rear-left landing gear which bend it a bit and blew the white shock absorber cover. The force of that impact disconnected the battery pack and the whole gimbal mounting from the rubber join. It then bounces around and finally landed in a pool of water totally submerging the whole Inspire 1 including the battery pack and camera..EVERYTHING! Made a mad dash to rescue the downed drone and wipe off any water. Went home and disassemble everything to dry it up part by part. Reassemble and when i started it, 3 out of 4 legs LED is yellow in colour. The DJI GO app will give out "ESC Board Error" on every attempt to start the craft for take off. Disassemble – Reassemble, then damn same error! but now 1 out of 4 legs. The gimbal on the other hand is ok but i decided to take it apart anyway just to dry up any moisture. After an exhaustive Disassemble – Reassemble..10:35pm the Inspire 1 made the expected beeping sound when started and there is no yellow LED on each of the legs. Start Sequence and yehuuu.. Did an IMU calibration and took it out for a quick flight. 100% back in business. P.S: reminder to everyone..don’t get too distracted by the video feed when you are flying as a single pilot. Here is the video footage on that fateful day..