Put your genius on the line as Kari Byron poses the big questions - why does helium give you a chipmunk voice? What's the best way to stick spoons to your nose? Discover how to chop wood in karate and find out why flamingos stand on one leg.

See the truly bizarre as super-long windbags inflate with a single puff and boats appear to float on air. How do firewalkers walk on hot coals, how do spiders walk on water and how do solar towers make power?