Lesson is... if you have an itch, leave it alone because we wouldn't want to crack our skulls open accidentally?!

Kate literally delves deep into the deep dark recesses of the human mind this week. Our brain is truly a fascinating organ, how much do you know about it?

To round things off, Kate also decides to share some of the more grotesque and unbelievable survival stories. The brain can withstand some pretty epic things but also send us on interesting new paths.