Tony Hawk 4 Easter Eggs

Here's the egg that lets you enter the haunted house...

Enter the Carnival level. (If you're too lazy to unlock the level by manually, type Watch_Me_Xplode as a cheat)
Skate over to the haunted house.
Grind the rail but don't stop grinding.
You... more

1. Go to the Zoo level.

2. Skate over to the hippo pen. Don't go in.

3. You will see two binocular type things. Line yourself up with either one and go forward slowly.

4. Enjoy the short clip!