The OS one is in a league of its own - it falls into the category of 'painful comedy', rather like Alan Partridge, only unintentionally so.

The shlapshtick noise when the guy runs into the lamppost at the end just about sums it up.

bmi's one has the nice feature that, when describing how to use the oxygen masks, instead of saying 'breathe normally', they say 'try to breathe as normally as possible'. Have the makers been watching BBC's Coupling?