Go into a shop that has a safe. Then, aim any gun except the rocket launcher at the clerk. You will have started a hold up and the clerk will put his or her hands up and say 'Don't kill me'. Continue aiming the gun at the clerk. He or she will start to move toward the safe, Follow him or her while still aiming your gun at them, or they she will put their hands down and sound the alarm. If you keep your gun aimed at them until he or she gets to the safe, they will open the it for you. You can now get what is in the safe. This will raise your felony, but will not sound the alarm.