There's this glitch where you can hit yourself and teammates, even with friendly fire off.
On Level 12 I heard you get the loud and annoying trait sometimes.
On Level 3 to 13, if you get lost from your house, I heard someone can come pick you up for free and take you home in his van.
I heard there is no NPCS in this game, everyone is a player! I wonder how it was like when this game was first made, must of been boring.