Flip people off by selecting “unarmed” in the weapons wheel and then pressing L1 on the PS3 or LB on the Xbox 360. This makes the character give the “one finger salute” to passing cars or pedestrians.
The Pratfall allows you to fall on your ass. Simply press X to jump and then press B while suspended in the air. Mind you, this does intimidate other characters in the game if you fall on them intentionally!
Moon Gravity allows your character to float through the sky like an airborne astronaut. On the Xbox 360, enter the code Left, Left, LB, RB, LB, Right, Left, LB, Left while PS3 users must enter the code Left, Left, L1, R1, L1, Right, Left, L1, and Left.
Discover a UFO in the ocean floor at the Northern edge of the map, get into a submarine & start looking!
Easy Ealy Money is quite the bait for money-hungry players. Rob an armored vehicle. They appear as blips on the minimap while you are driving around.