Remember the guy who was demonstrating how an electrostatic discharge gun works? Well, he’s back again this time giving a very funny explanation of how a coil gun works. [via]
I love this giant wood counter! Other than that, this is a very elegant and simple explanation of how mechanical counters carry over numbers while counting.
Core77 posted this great video of how a Skycam works. I’d like to drive one of these one day.