Interesting video of the effect: <a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=_XpGUYbehSk" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=_XpGUYbehSk</a><p>EDIT: Well, I thought it was interesting anyway... my ability to perceive flicker deteriorated markedly after the age of 30 but this way I can at least see how the camera sees it! (I will be keeping an eye out for this phenomenon now but I doubt I could spot it any more unless right out of the corner of my eye.)