Now I know I probably shouldn't say this, but I did rather enjoy "Shark Killer". I am sure that was almost entirely down to the eye-candy Derek Theler's quite tongue in cheek effort as local Lothario "Chase" who pretty much charms and sleeps his way through life! One morning he is summoned to his hoodlum stepbrother's home where he is given a challenge. Find a black-finned shark that has swallowed a priceless diamond before it's discovered by his nemesis "Nix" (Arnold "Mummy" Vosloo). What we discover quite quickly is that "Chase" is no slouch when it comes to the ninja skills, and that's…