She pinches you up between two fingers and holds your squirming body right in front of the sole of the boot resting on her knee. You can see the non-skid tread very closely...every inground pebble and spot of dried filth, even some red splotches that used to be men.
Without saying anything, she simply presses your little body flatly into the tread with her fingers, smushing you into a drop of goo, rubbing the droplets of mush into the fine lines of the tread.