There are many Hollywood films that include a scene where the protagonist reaches an oasis in the desert. In some films the oasis provides water that saves the charcater's life, in others the oasis is barren and the character dies. In every film where I have seen such a scene it has annoyed me. Surely, the protagonist should have had the foresight to carry a sifficient quantity of water. If, however, unforeseen circumstances caused him to be abandoned in the desert unprepared then how are the viewers expected to believe the luck he must encounter in order to find an oasis.

Oases are widely-spaced but are clearly marked on maps and this includes their seasonal changes.

Every time I see such a scene now I wish the charcater's demise.