Have player two chop your character's head off, and then when you go back into one-player mode CJ will have no head, and a nasty little blood effect. Start the burglary missions and park infront of a barber shop.
Enter said shop and walk into the red circle to take a seat.
Occasionally a parked car will spawn, but they are kinda rare.
This allows you to get cycling skills faster than with normal bike riding.
Do a bunny hop onto the back of the freight train so that you can ride it and stay on the bike.
When the train starts to move again the bike will start to slide.
At this point press the X button to pedal the bike.
The bike should now be floating slightly above the train but will remain in place.You HAVE TO have the gang member with you, or else it will not work. When talking on the cellphone, press Triangle to end the conversation then quickly switch to the tec9, in your hands you will have a cellphone that shoots!