Grind Session (Playstation) Easter Egg - Did You Notice?

1.) In the training level, spray-painted on the walls are 3 pictures of secret characters hidden in the game.

2.) Also on the level, atlanta, by the halpipe there is a fake store called "willy's workshop" this is in relation to the fact that willy santos's signature board is called "willy's workshop"

3.) On the level, Huntington, in the crowd of people by the bowl there is a person holding a sign that says "Pause, d,l,u,r d,l,u,r" which is the code for unlocking all tricks.

4.) In the same crowd there is a person holding a sign that says "thanks rick" i don't know who he is but he's definetely not one of the characters in the game.