The 30-degree rule is a basic film editing guideline that states the camera should move at least 30 degrees between shots of the same subject occurring in succession. If this rule isn't followed a jump cut occurs and there is a risk that the audience starts focusing on the filming technique instead of the story that is being narrated. When Mèliés himself made his famous A Trip to the Moon in 1902 he tried to edit together film clips of the same framing and with the same angle, after changing the scene between the shots, to make it look like there was no cut at all.