Sweeping away is indeed from Hippies – Ray (Simon Pegg) embarking on a long and elaborate metaphor, with props.
“There should be legislation” is even more obscure, but is a particular favourite of mine and Cappsy’s – it’s from a sketch in the first edition of Lee & Herring’s eponymous 1FM show from the mid-nineties.
HERRING: It’s tantamount to slavery! There should be legislation.
THE ACTOR KEVIN ELDON: Slavery *is* illegal.
HERRING: Well… good.