I've heard of this useful trick before and recently saw it in a video, so I made a little animation of it (click the attached image). The source was this video:
Source: https://www.youtube.com/watch?v=EMEkCfyi55o
Source: https://www.youtube.com/watch?v=EMEkCfyi55o
(This post was last modified: 08 Feb 2016, 13:37 by helpless85.)