The more you think about it the worse your situation seems. Yes yours is the Mega weapon. But they have the numbers and endless weaponry if the get the national guard or even the army on it. Sharp shooters all over. You'll never make it out of here alive!
You wire your weapon to start blasting randomly every three to four minutes until the battery runs out and you flee! You are behind the building and running when the first blast takes a stop sign out and makes the billboard behind it lean at a damaged angle. You walk now, acting casual. They don't know what you look like. you hear the sirens pulling up around the old abandoned book store and your out of here.