Hook Fernando de Rojas up to a generator and watch him spin.
(EDIT: added description of the most egregious fourth wall breaking, and a bit more detail on what went wrong)
The Edinburgh Festival is a collection of superb theatre and horribly bad. And, like all such mixtures, that which you have highest hopes for can be the thing that turns out to be by far the worst.
Tonight I have seen Celestina by Fernando de Rojas. I must believe I have, the ticket assures me. I have severe doubts. Particularly after they broke the fourth wall to state how the original is far too long and you wouldn't want to see it, so enjoy this simulated sex scene instead.