Random pots in peoples houses might hold herbs and weapons for you to take.
People who matter, like me, get cutscenes. The rest of you mortals will die.
Scattered around the world are floating brick boxes that you can somehow break with your head if you eat a mushroom, to get cash and more mushrooms.
Your enemies can hurt you by walking into you. You have to jump on them or use actual attacks to reciprocate.
Vehicles can peel out on a banana peel.
Princesses with avoid putting out after you rescue them by getting captured again.
Some grenades can stick to people and things, but not to the hand that throws it.
People in the future fight with futuristic swords, even with guns available.
Life will hand you new weapons or powers right when you need them.
There is an island out there somewhere inhabited by apes born from barrels who must constantly battle a demented bipedal crocodile.