I remember, when I was 13, I started to like planes. So my grandpa decided to take me to a private airport where my uncle worked, it was empty at the moment, because one of the gliders they had, it just needed repair, not gonna tell you why. Lets get to the point.

By that day, he decided to take his favorite plane, the oldest one. He knew its state isn’t the best. It was a white stunt-plane. The plane took of for the fifth time. And the unexpected happened. After A flyby at altitude + - 5 M.
right over my head, the plane dropped its batteries: There was a battery cargo bay, that just opened and the batteries fell down.( The plane took a poop lol).
I was just watching how the engine stopped, and it was just gliding. BUT! The regulator decided to keep the flap actuators still going, not very well but a bit controllable (he said). That saved the day. As he told my uncle to go catching it (just in case. He believed that it’s possible to land)
I watched the plane slowly descend to ground. 20 seconds afterwards, the plane touched down. The batteries were found, and grandpa repaired the battery bay.