 As Uncle Billy is leaving Georges house drunk, it sounds as if he  stumbles over some trash cans on the sidewalk. In fact, a crew  member dropped some equipment right after Uncle Billy left the  screen. Both actors continued with the scene ("Im all right, Im  all right!") and director Frank Capra (qv) decided to use it in  the final cut. He gave the clumsy stagehand a $10 bonus for  "improving the sound."