waterboard the animal with acid
OK Hasan, whatever you wish. Now you are an enemy combatant wearing the uniform of the US...shoot him as a spy, immediately after dipping the bullets in bacon grease.
Use "soda water" from a seltzer bottle, head down, feet up. Couple of shots up the nose and they'll be screaming like a little girl for you to stop. It's a great way to clean the crud out of sinus cavities, and it doesn't leave a mark!
They'll do anything to avoid a second treatment and babbling so fast you'll have to tape the conversations so you can slow it down later.
Regards,
GtG
PS The carbonation (fizz) makes the mock drowning much worse than ordinary water, it will make the dead quite loquacious.