You must have a vehicle that holds passengers for this
trick. First, go to controls, switch the eject passenger control
on the 2 3 4 boxes to "D", and save it on all modes
Start any type of game and get a passenger. When you press D,
you will have unlimited passengers, but the passenger has to be
in a different vehicle. For example, if you are driving the Scorp
Tank and do the trick, you make your passenger in a guard tower,
and he will stay there. If they are not in a vehicle, they will
disappear. If you press D again when one of the passengers
die (are ejected), then all the extra people will be killed.