This is a very popular effect in film and television, where the camera switches focus on objects in one shot.
You'll see how to do it, as long as your camera has manual focus. If it doesn't, then want kind of camera do you have? One of those plastic ones from Chuck E. Cheese?
Want to master Microsoft Excel and take your work-from-home job prospects to the next level? Jump-start your career with our Premium A-to-Z Microsoft Excel Training Bundle from the new Gadget Hacks Shop and get lifetime access to more than 40 hours of Basic to Advanced instruction on functions, formula, tools, and more.