Thanks for this enlightenment.. Just a few days back I was cleaning my room and decided to use sniper in the process, I immediately noticed I couldn't breathe properly, before I knew it, symptoms became severe as I couldn't ever take a walk down to my bathroom without gasping for breadth... Was really curious as to what could possible be the cause... Decided to check the internet.. And here it was, hazadous sniper... I should warn my friends too... Thanks Guys