Starting on Level 16: Sphynxinator, a you'll notice a few "newcomers" to things and people trying to hurt you, one of them being a hopping egyptian coffin that will fall on you should you get too close to it.
If you attack the coffin, a mummy will break free of it. Instead of attacking/avoiding that mummy, embrace its love and let it kill you. It'll hug/subdue you to death, during when the trophy should pop.