by the way, my dad points out cool stuff about hydrogen

[eub]

As a medical gas. At below the flammable limit in air even.

http://medicalxpress.com/news/2011-05-inhaling-hydrogen-lung-critically-ill.html
Inhaling small amounts of hydrogen in addition to concentrated oxygen may help stem the damage to lung tissue that can occur when critically ill patients are given oxygen for long periods of time, according to a rat model study conducted by researchers in Pittsburgh. The study also found hydrogen initiates activation of heme-oxygenase (HO-1), an enzyme that protects lung cells.

Heme oxygenase is a nifty and useful enzyme I'd never heard about.