blade

Because it's in a bowl, the rounded blade allows it to chop through the mixture easier than a knife.

Helicopter pilot have ability precisely change to pitch their blades by adjusting the control called Collective.

Assuming that the propeller blades not rotating.

Takuetsu wrestled it away and flung the blade across the room.

So it's less of a flat treadmill and more of a bunch of small blades that are rotating under your feet.

Not in some Blade Runner replicant way, but you could run a system that loads up the YouTube video page, reads the number of views, and then goes to the video manager, changes the title, and hits save.