[null and void]

I'm considering getting a loud speaker/tape recorder system that, should anyone happen to bust through my front door en masse and in body armor would loudly announce "I AM A THIRTY SECOND BOMB! I AM A THIRTY SECOND BOMB! TWENTY-EIGHT. TWENTY SEVEN. TWENTY SIX..."

It should make for a very short visit...

[Tijeras_Slim]

That you, Johnnie?

[G Larry]

heck....start at 10 seconds...

no sense letting them think they have 20 seconds for heroics....OR....taking you out...

[karnage]

You would be swiftly ventilated.

[zeugma]

"I AM A THIRTY SECOND BOMB! I AM A THIRTY SECOND BOMB! TWENTY-EIGHT. TWENTY SEVEN. TWENTY SIX..."

I've seen that in a book. Can't remember where. I need to set up an audio file like that as an alarm system.