A sound composed from bunching wet paper towels smacked against the floor and a wet bottle of liquid being sloshed mixed together to create an impact sound. Creates a horrible sensation of flesh impacted by a powerful shockwave. A bottle with liquid being sloshed around gently can provide the needed element of a subdued liquid sound - taking away the need to filter it with low pass filters (but it can help boost other frequencies).
I forgot what i used for this specifically. Listening to it it kind of sounds like a ball hitting the ground, although that wasn't what i used to create it.