Police say Fredrick Walker threw a woman onto the hot coals after he knocked over the grill in front of a home in Inwood, Long Island, on Saturday.
Police say he also struck the woman's head against the sidewalk and stabbed her in the neck with the utensil.
When a man tried to intervene, police say Walker pushed the man onto the hot coals.
Both victims were treated for cuts and burns at a hospital.
Walker was charged with assault and criminal possession of a weapon.
It wasn't immediately known if he had a lawyer