Itchiest Substance Brainiac: Science Abuse : Season 4 Episode 4

The entertaining science show engages in more experiments with the main features in this episode being: Testing out the a variety of substances to determine the most itchiest, Can you run through wallpaper?, The search for the strongest bat, Finding out which food gives off the longest lasting smell and finding out if helium makes a stereo sound squeaky. More Microwaves and Caravans go boom and Derek Achorah is the celebrity on helium.