Really? Wow, why is that? Helium it is then.
http://en.wikipedia.org/wiki/Hydrogen#Properties http://en.wikipedia.org/wiki/Hydrogen_embrittlement
@atk started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
http://en.wikipedia.org/wiki/Hydrogen#Properties
http://en.wikipedia.org/wiki/Hydrogen_embrittlement