Hahaha...oh, no! I don't suppose it was red grape juice, either (or green)?!:)
Well he could still be the Purple Elf.
I hope he put it in a bucket with stain remover to soak or it could be an ex-costume
Grape Juice! There really isn't much worse when it comes to stains. Maybe he can put a box over his head and go as a present.
Was he watching The Grape Pumpkin? Ha,ha,ha!