1.   The grass blades tore, but their initial resistance sent him stumbling backwards.

2.   A dull blade will tear and rip at the grass rather that slice right through it, Novotny said.

3.   Novotny said that a sharp cut will not add stress to the grass, whereas a dull blade will tear and rip at the grass.

4.   Smaller blades also tear at the ceiling and floor to produce a smooth, oval-shaped corridor.

5.   The film will quickly dull even the sharpest blade, and dull blades will tear, not cut the film.