Yes, mid show replacements happen. People get sick, injured, have emergencies, get bad news....things they can't control. o different then whe any other person leaves work early.
It's odd for about a minute or two, and then you just go with it.
If we're not having fun, then why are we doing it?
These are DISCUSSION boards, not mutual admiration boards. Discussion only occurs when we are willing to hear what others are thinking, regardless of whether it is alignment to our own thoughts.