Hi Mondrian. Yes, a morning and a half down here in the south west (we're not all from Cheshire...) and a chance to do some serious gardening.
Not sure what I scrobe in the past to betray thespian tendencies but, yes, you're spot on, in that I taught theatah for many a year. As for break a leg, I think it replaces 'Good luck' as to say that invites luck of the opposite sort, so 'break a leg' invokes opposite magic. Whether 'may you drown in your own spit' would work as successfully, I've never tested...