I think I've done it! Not sure though, as I am not thinking I don't even know whether more than a second has passed. It's the weirdest sensation and I only notice it when I try to think about what I was just doing. I never do it on purpose, just taking a break from thinking.
There have been times where I forget to breathe and all of a sudden I gasp for air without realizing I stopped breathing. Its weird
I thought I was the only weird one to think about this since I was a kid lol. I can't not think, just think about not thinking.