Originally Posted by Peterpan1

"Contrary to popular belief, learning to weld via solo DIY is both foolish and potentually dangerous. "
There are hazards associated with the shield gas, even though it isn't flamable, in fact you can sometimes use it to snuff out fire on backer materials. Basically mishandling the bottles can be dangerous if htey suddenly decompress. There is also the possibility of asphixiation.