This is a simple trick using high school physics where you can measure the height of really tall objects like a cliff, using just a stopwatch. Special thanks to Active Life Store for the GoPro shots. You can get one from them here: http://www.bit.ly/1y41QA2 PLEASE CONSIDER SUBSCRIBING: http://tinyurl.com/MarkRober-Sub Here is a link to the FREE app (free as in FREE, as in I don't even have any ads in it or make any money off of it whatsoever) in the app store (sorry, no android at this