When I was at school, one teacher of mine was using one saying, which could be translated like "blood from nose - but it must be done". It was about studying and deadlines of course. So, for a long time I were thinking that this is just saying, but I can see now, that it isn't just like this - blood is really running from nose, when you are close to your body's limits. But we all know that all boundaries are only in our minds. Do we?