Yes, but instead of thinking of a wall, you want to focus on a blade edge.
[Ginia takes one of the brochures off the table and sets it on the ground. Left hand in halberd position, she focuses on channeling the borderline into a slicing edge. She slashes her hand through the air, a neat slash across the paper.]
With practice, you can cut exactly what you want to cut. Starting out, you might end up slicing deeper than you intend. Give it a try.
no subject
[Ginia takes one of the brochures off the table and sets it on the ground. Left hand in halberd position, she focuses on channeling the borderline into a slicing edge. She slashes her hand through the air, a neat slash across the paper.]
With practice, you can cut exactly what you want to cut. Starting out, you might end up slicing deeper than you intend. Give it a try.