Sometimes, spontaneous moments work out so well that they outshine planned things. It frequently occurs when shooting a movie.
Viral Inspiral found 12 moments when the shooting went off course, but it only made the movies more interesting.
12.Guardians of the Galaxy — the sphere scene
According to the director, Chris Pratt dropped the sphere with the Stone of Infinity not because it was planned but because he was just clumsy. He dropped the sphere, but he stayed in character. That’s why this mistake looks like it was originally in the script.