Feel free to yell, scream, bang at the door, but it's pointless.

Look at you. Such a perfect little slave to the system. Loyal, obedient, never questioning, always trusting the Authority to tell you what to do. Is it any wonder that when they said they needed volunteers to do this so that many others could live, you were oh so eager to write 'die' in your metaphorical schedule for today?

Hi. I'm that little voice within you kept suppressed, sticking imaginary fingers in your soul's ears, going LALALALA I CAN'T HEAR YOU. The name is Doubt.

Cosmic irony that you finally chose to listen to me when the chamber doors closed.