Board Thread:WARNING ALL USERS False Info\Spoilers/@comment-13965604-20130912213213/@comment-2601:8B:C302:69F2:8D1A:659A:EB81:4A29-20180807195708

I think it's Allison's physique, so it would be her, and I never thought it was mud. Due to the theme I thought it was some 'mysterious goo' (as someone replied above) or even blood.