Continuity mistake: Frasier is recounting what happened in Cafe Nervosa and we see the flashback - he is explaining why Bulldog is not a hero. In the flashback, we see Bulldog grab hold of Roz and he throws his coffee supposedly towards the gunman. However, the shot shows the cup rolling back towards where Bulldog was standing. In the next shot, we see the coffee cup again, hurtling towards the gunman, and spilling coffee on him.
Continuity mistake: When Bulldog wheels his things into the booth, there is nothing on top of the tape deck behind and to our left of Frasier's chair. As the shot changes and he says "you can vouch for that, Myrna", there is suddenly a blue cassette on top of the deck. The shot changes again and Roz puts her plate of cookies down on top of the tape deck - the cassette has disappeared.
Visible crew/equipment: When Frasier is getting ready to leave his booth while Bulldog starts his show, through the door on the left we can see a fairly thick white cable suspended in the air. It is visible for a couple of shots, but when Frasier opens the door to leave, it is gone.