1) Ammo pickups.........who's leaving all this ammo behind? Hell, Robocop for xbox (HORRIBLE GAME) had ammo pickups....yet his gun is the only one of its kind in existence!
2) Nonsensical Puzzles: Hey, I'm a diabolical bad guy, and I'm being chased by the hero......what to do, what to do.....OH, I KNOW!!!! I'll hide this key to the door in a magical box that can only be opened when you put this picture that's been broken into 9 pieces back together. That'll slow him down! Of course, I could just hide/destroy the key...