Well made video. It's said that human behaviour is so predictable on patience, that not providing tactile feedback on progress, causes the human mind to spiral out of control, to the point where they will completely remove power from a device and restart it, the moment they don't know if it's actually working.<br><br>This is perhaps one of the most widest known aspects in programming. You feed cards into a machine with all of the code, and you need to know that it's actually working.