Keeping myself as still as I possibly can, balancing on top of the cinder block. Arms, legs, elbows, and neck bound by zip ties and the two on my neck, so tight that it makes it difficult for me to breathe. Something I love A LOT! Afraid to move, hard to breathe, and mouth stuffed, then held tightly in place with more zip ties! We both love it so much, Martin completes it all with a orgasm which was quite hard for me to achieve because I was so focused on NOT falling. Took me a while to cum, but when I finally did, it was awesome!