When the flight hits turbulence, the captain tells everyone to put on their seat belt. You see/hear everyone doing it but when the flight attendant tells the "corpse" to put on his seat belt, he falls forward and she screams. The instant she screams, at least 6 people jump to their feet without unbuckling.
As the airplane is coming in to land at Heathrow, there is an establishing shot of the wheels down and in the background there are cars traveling on the British motorway system. Except the cars are driving on the wrong side of the road.