Citizen Kane (1941)

Continuity mistake: In the scene with the lovely dancing ladies, Cotten blows cigar smoke just before a cut to him from the opposite angle. From this angle there is no smoke. This takes place just before Wells throws his jacket to Cotten.

Charles Foster Kane: Rosebud.

Trivia: Steven Spielberg bought the famous 'Rosebud' prop at an auction in 1982 for $60,500. When Orson Welles heard about this, it was reported that his reaction was, 'I thought we burned it.'

Allister Cooper, 2011