There, the father's over there, guarding the mother.
He sees you and notices, A, you're not red, and B, you're floating, and C, you aren't anything like these imposter imps. haha, you think to yourself, IMPosters. You see yourself out of the metaphorical open night.
Aside from that, the father wants to get the urn away from these imps, so, his best idea is to throw it at you.