According to Murphy's law things can partly be very strange.
Had it at WAW 3 years ago that we were checked in for WAW-DUS with boarding passes for an AB 738 but arriving at the a/c found out that it was a F100. Just as the turmoil in the cabin had settled down and everybody found a free seat (about 75 pax only), the Cpt came from his cockpit and informed us that also the loading had been done in 738 style - all luggage in the rear hold.
So 75 pax had to squeeze in the front rows, leaving as many aft seats as possible free...
