When you get all the gaps, you unlock the following:

Throw a bead at any girl in New Orleans, and they'll pull up their shirt to reveal the word, censor.

Go into the cheats menu, and type in:

First go to the Berlin level and go inside the church. Then climb the ladder and go around to the side where you could acid drop outside the church. But instead of acid dropping go right and jump into a little space on the right. Keep hopping up and you will keep going higher and higher. In the air press Z to get on your board and you will keep bouncing back and forth. Now you can do unlimited moves to get insane points! Get off your board when you want to stop.

For this, you need Pro Skater unlocked. To do this glitch, go to Pro Skater in Space and go to an elevator and set a restart in there. Go out of the elevator, then pause and select goto restart, and then you'll be stuck in the elevator! To get out, you would have to switch to a different level, then go back, or just quit and get to the main menu.