The annual purge.

You were scrambling to find a safe place as the speech about the annual purge could be heard echoing throughout the city. However, you wouldn't be able to make it anywhere before the sirens blared, as you were only on foot.

Then, the sirens started blaring, and the purge officially started. Over the sirens, you heard someone revving a bike behind you. When you turned, there were multiple masked men. Some on bikes, and a van out of which a guy came out. He was dressed in dark clothes, carried a machete and wore a white mask which had been painted. Red lips, pink cheeks, and the most prominent feature about it: The word "GOD" written on the forehead.

He rose his free hand and waved at you provokingly while the other men stood back and watched, waiting for something to happen.