I know, 100% my fault - My 3 year old great-grandson wanted to fly one of Papaw's drones. I figured the Tello would be the most logical, better to crash a $99 one than a $1800 one. He did really great for a while, then he crashed into a tree. Fortunately, with my tallest step ladder and a broom handle, I managed to retrieve it. Even if I had not been able to get it down, the look on his mother's face when he told her he crashed Papaw's drone into a tree was priceless! 
