Cheats: Super Mario 64
Cinema camera Angles:
You need two controllers plugged in to do this trick. When you defeat the game you can use the control stick on the second controller to move the camera around while the princess is talking to Mario. You can also do this while the credits are going by.
Second floor:
Go to Course 5 (Big Boo's Haunt). Go inside the big house and into the room with the red grid above you. Wall kick against the back wall and to the right. You should land on the grid and then go across the grid to the door. You are now on the seond floor.