It's a damned flashback. We start off with a panel filled with a "Knock, knock" sound effect, followed by "CRASSHHHH!!!" only to have 6 year old Mike, who's in his PJs carrying Super Teddy, tell his just-now-awakened parents they told him he should knock before entering rooms.
Great. Another week of Young Elly doing ballistic over piddly-crap because she's too stupid to understand how children behave. I guess howtheduck is right when he says we've been given all the wedding preparation we're gonna get.