Some abdominal muscles: how to use them with coins November 11, 2012 Marc Abrahams This video shows some motions of the human abdominal muscles, useful for manipulating coins: Share this: Share on Facebook (Opens in new window) Facebook Share on LinkedIn (Opens in new window) LinkedIn Share on Mastodon (Opens in new window) Mastodon Share on Bluesky (Opens in new window) Bluesky