finished a J-3 Cub for a friend that wanted it to be a brushless instead of glow. It was close to done when I got it from him, but the electronics weren't installed. I installed all the electronics and finished what was left of the build. I decided to check the servos and center everything while the plane was on a table in my livingroom. Plugged in a lipo like an idiot with the motor plugged into the ESC and the throttle servo was reversed. The plane took off, sliced my forearm 6 times with the propeller and hit a wall. Bandaged up my arm, fixed the plane, and drove it to my friends house. Lesson learned. Happy I only had 6 cuts....