ATM Cash Glitch
Find an ATM then block off traffic in the road leading to it so cars cannot pass. Then wait for someone to use the ATM, kill them then take the money they drop. It's essential at this point that you have done a good job at blocking the roads so the ambulance can not take away the corpse.
With that said... Run a bit away from your victim and go back again and the same money should be available to pick up again... If anyone is using the ATM when you go back you can kill them too and each time you return their cash will have respawned too.
Added by: Team SuperCheats May 3rd 2008, ID#2481