This is a very obscure cheat I noticed recently. This is sort of like the Re2 cheat where you can shoot the camera. You have to be where you've had Chris and now have Claire again, a little before you meet the Steve-Monster. You go past the first tentacle then get to the second one. Line up so that you only see Claire's back and she is very near to the tentacle (but not within its reach). Take out the grenade launcher, arm the normal rounds and fire at the tentacle. If you do it right the tentacle's green blood should splatter on the camera. Once you move Claire it goes away.