You'd have to pull off some kind of rebound shot.

( my other username is a porsche , posting shit pictures so you don't have to, Mon 25 Feb 2008, 15:58, archived)

I was thinking about a litre would do it to ensure covering of both ears.

( drbroon a poor wee monkey stole his face, Mon 25 Feb 2008, 16:00, archived)

That depends on what kind of efficiency you're getting.

( my other username is a porsche , posting shit pictures so you don't have to, Mon 25 Feb 2008, 16:01, archived)