Flint Marko aka Sandman, is the secondary antagonist of Spider-Man 3 and SMNWH, where he was portrayed by Thomas Haden Church. He is a professional criminal who accidentally kills Peter Parker's uncle, Ben Parker. Running from the police after escaping from prison he accidentally falls into an experimental particle accelerator that molecularly binds him with sand, giving him shapeshifting sand abilities. Marvel Comics cursor with Spider-Man: No Way Home Sandman.