Well I was watching videos trying to catch the Australian accent, which I found to be very cool... One video led to another, and somehow I ended up watching this: https://www.youtube.com/watch?v=hp6J6PF47CM
From another angle, and longer explanation: https://www.youtube.com/watch?v=BsWhGBgbUsc
I have never seen something like that in real life, I couldn't believe it.