if somethings slides on something else then that something is moving against that something else
slide is motion. hijacking is unnatural_thing. trying_to_take_hostage is unnatural_thing. trying_to_steal_information is unnatural_thing. slide is plaything. moving_things is not_at_rest. spreading_stuff_onto_surface is spreading. spreading_stuff_onto_surface is applying_stuff_to_surface. stealing is unnatural_thing.