Causality Road Rage Walkthrough

Description of the walkthrough (what you have to do):
When the policeman stops click on his gun - click on the yellow sign inside the gas station - keep clicking on the green button inside the gas station until the guy filling the gas gets mad - wait for this guy to come closer to the shop - click on the red trolley so that the guy would trip - click on the shelves inside the gas station - keep clicking on the clerk so that the two guys will continue talking with each other and wait until the third guy draws out his pistol - click on the gun - click on the plastic bag near the worker - click on the gun again to shoot it.