Marcus, pardon my computer illiteracy but you can get there by going to google.com and searching "circular breathing". It's one of the first sites listed. Good luck.

Bonnie, scrooching is probably synonymous with scrunching and a if I'm not mistaken a didgeridoo is an Austrailian aboriginal wind instrument made from a hollowed-out tree limb which makes a wide range of sounds. Maybe someone more knowledgable will further enlighten us.

Frankie