It happened to me only once, but I laughed so hard!
A few days ago when I was reading a book (sony reader) I was immersed so deeply into the book that when I finish a page I tried to actually "turn" the page by reaching the top right corner of the reader and trying to turn the page. Obviously it didn't work and I started to do it again assuming that my fingers just slipped at the first attempt, only when I reached the corner of the reader and touched it again I realized what I was doing!!!