Adam donates the use of his feet in a fire walking experiment and Karl brutally subjects members of the studio audience to hot chilies.

Adam is put under hypnosis as Karl breaks down the feeling of déjà vu. Plus, the team perform a test on the studio audience to demonstrate how a person's perception of the world can be filtered.

The Geeks look at men's wandering eyes compared to women's, how early women begin their propensity to talk, and how Leonardo da Vinci really was a dirty old man. Then there are some well overdue facts about nose picking.

The Sleek Geeks examine Einstein's theory of relativity and show that none of us are actually living in the real world, because we're all on time delay.

Adam and Karl learn what it is like to experience the feeling of zero gravity. Plus, the team unveil a simple zap-prevention device.

Ice and its role in the beginning of life, plus the best way to keep beer cool in an esky. Savour the delights of Adam's urine and bathwater and look at the real story behind rips, what they are, how they work and how you can spot one.