‘One last job’. A character who has apparently been a successful career criminal suddenly forgets all their experience on their Final heist and starts making mistakes to let the plucky hero defeat them.

If someone has to disguise themselves it just so happens the security guard/Doctor/Police Officer they attack will be exactly the same size as them and therefore their clothes will fit perfectly. The exception is a comedy film when the clothes will always be far too tight despite the characters actually looking roughly the same size.

Security at an airport is almost non existent until just before the gate when the inevitable jobsworth will stop the man from proclaiming undying love to his partner.

Any disturbance on a plane eventually leads to overhead bins opening and they are always full of loose paper that blows everywhere. Before long the oxygen masks will follow.