Just finishing this vid by Matt Khan and massively impressed, have explained or tried to explain this to people over the years but now after down loading this, an aha and omg moment enjoyed >
Source: https://www.youtube.com/watch?v=9HP7Emi0Gls
Deserves its own thread, just like the Way out of Pain vid and I Don't Know vid imo.
Lol, is also a wee bit like a comedy show at times.