I believe that they would rather fold back than cut.
Knowing how this head operates....I aimagine it to be cutting before and as it locks into place.
Schultzy.....the comment that P'd me off was the one telling us (basically) not to re-use blades. I find this hilarious.....when the company can't produce replacement blades to meet the market needs. I'm not REAL happy about having to keep buying heads to keep using the product.....when all I really needed was the replacement blades.