One day I went to return a driver's license that someone had dropped.
I went to the courthouse because that is where the DMV is.
There were metal detectors there. I went in and asked the officer
if he could take the license to where it should go and he said yes.
I didn't want to go through the metal detectors because I didn't need
to go in the court house. Instead I went out the door. It said:

NO EXIT

As I left there were sirens. I hurried home in case they would get me
for exiting out of the entrance. When I got home I was corrected.


They weren't following you because you exited out of the entrance.
They were following you because you made that lethal noise!

To get the full effect of this noise you need speakers that can produce good bass sound.