Re: And then there was the incredible shrinking cube...
Reminds me of further maths lessons where we would all shuffle our desks forwards an imperceptibly small amount when the old, nearly deaf teacher was writing on the blackboard. As he spent most of the lesson talking to himself and scribbling algebra we got a good twenty to thirty minutes in before he turned round and paid enough attention to notice a dozen boys intently copying down his proofs and doing their best to look angelic mere inches from the front of the classroom. He frequently went absolutely flipping nuts at us, which of course only encouraged us further.