When Betty McGill is making breakfast (Act 2, Scene 1), she places two pieces of obviously-already-toasted bread in a toaster and then presses the lever partway down, leaving the bread up. A couple of minutes later, she goes back to the toaster and retrieves the bread, even though it never moved and no bell dinged. This was evidently done deliberately so the bell wouldn't step on one of the actors while (s)he was speaking.