If the Chaos Spawn grabs someone, GET CLOSER FOR THE EMPEROR'S SAKE
When a Chaos Spawn lands a grab, they will chew on the player before throwing them across the room. This does significant damage to the player, and HEALS the Chaos Spawn.
YOU CAN INTERRUPT THIS. YES YOU, REJECT!
Simply approach the Chaos Spawn. He will then swing the player at you like a makeshift club and not chew on him. This will do no damage to the player. If you are blocking, as you should, this will do no damage to you. THIS WILL NOT ALLOW THE CHAOS SPAWN TO HEAL.
The last four chaos spawns I have fought I have watched someone get grabbed, then watched our teammate next to them just stare at the chaos spawn like a poxhound in front of a rogal dorn battletank.
DON'T JUST STAND THERE, GET CLOSER! PLEASE! MY AMMO SUPPLY, SANITY, AND THE COMPLETABILITY OF THIS RUN ARE ALL BEGGING YOU!