Charles Foster Kane: You know, Mr. Bernstein, if I hadn't been very rich, I might have been a really great man.
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.
The shot of the loud, squawking bird was purposely placed by Orson Welles to make sure the audience was still awake.