In Tsukihime, Arcueid eliminated Roa by using marble phantasm to turn the layers of the atmosphere in the hallway into a vacuum, like a carving knife slicing up a daikon radish. Though she could not affect Roa himself, it was impossible for him to avoid the finely sliced atmosphere, and he was reduced to nothing but ankles.
(The gap above the floor was the result of a deficiency in Arcueid's imagination.)

Tsukihime Dokuhon PlusPeriod - TSUKIHIME Dictionary: Marble Phantasm