No no no, just let the broom in the closet. You can also make a screenshot without fancy moves on your Samsung Galaxy S3. No kidding: One of the nifty built-in features of the Galaxy S3 is that you can make a screenshot by the side of your hand to sweep across the screen. It looks nice, but the big disadvantage is that it does not everywhere.
Fortunately, Samsung is not the hardest, so you can even take screenshots by both the Home button and Power button for a second or so to press. It looks less ‘scifi’, but it is at least as effective, and moreover always.