I built a 1B FPS video camera to watch light move

Inspired by the MIT camera discussed here 13 years ago<p>Trillion-frame-per-second video <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=3346609">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=3346609</a>