After Sam is dumped off at the railroad tracks he returns to Cheers. He enters wearing his red coat and scarf and goes behind the bar while Carla is asking about his evening. When the camera cuts back to show Cliff asking a question you can see Sam coming through the door again and Cliff's mouth isn't moving.
Frasier says, "Who do you think he looks most like--me or Lilith?" Frasier is a stickler for proper grammar, so he would have properly said "looks more like". This is an error in writing or performance.
When Cliff, Norm, and Frasier are standing outside Little Wally's, the shot changes to a shot of Frasier, which suddenly goes out of focus and racks back into focus.