a) duty free is always cheaper at every other stopover.
b) the person in front of you at the immigration queue has always filled out his/her form wrongly
c) transfer gates are always the maximum distance apart.
d) early arriving aircraft never have a gate (esp at heathrow).
e) inflight entertainment never works when your favourite film is on
f)the seat in front of you always reclines 30 degrees more than it was intended.
g) the kid behind you kicking your seat has been disowned by the parents
h) the flight attendants (and sometimes the captain) forget where they are flying to in their welcome aboard "speech".
i) your row companion on the 24 hour flight to london has eaten 20 gloves of garlic to ward off a suspected cold.
j)on ground airconditioning units always fail in the hottest countries.