What amazes me about this is why didn't these pax realise they were boarding a longhaul 777 instead of a smaller 320/737.
You'll be surprised when boarding through an airbridge, one doesn't actually get to see what the exterior of the aircraft looks like:
AF BHX/CDG ... I'd sat in the cabin a while believing that I was on the scheduled BAe146, looked out of the window to see a wing below me with no engine(s) attached, upon checking the safety card I came to realise I was on a subchartered in MD80 series.
LX BHX/ZRH ... Believing it to be a BAe146 again it turned out to be a Helvetic F100.
CX HKG/CEB ... Scheduled to be an A340, looked out of the window to find only one engine attached to the wing, I was on an A330.
CX CEB/HKG ... Scheduled to be an A330 but this time the wing had two engines attached to it!