What activities do you lose yourself in?

To lose yourself in any activity requires complete focus. And maybe old age also helps! Now that I am on the wrong side of fifty , I notice that I tend to forget the rest of the world when occupied with certain tasks. This could be my office work or learning how to play the guitar ( yes, I stated that recently) or watch some interesting movies, reading a well written novel….for a few minutes, I am in a different zone. Time flies by, hours, minutes, and seconds all roll by.