You have to do kind of a combination of pushing down with your butt to get upward momentum, then pulling up with your abs. Then you keep it going with the two.
It's hell. And to get up, you grab the edge of the desk and pull. 0/10 Do not recommend.
Yes, but they were excellent for kneeling on backwards, with your chest on the seat when you, uh, had need of that particular position for whatever reason.