http://chemistry.about.com/od/toxicchemicals/a/Mixing-Bleach-And-Ammonia.htm
Posting before some idiot without basic chemistry training tries this.
Chemicals Involved
Note that each and every one of these chemicals is toxic, except for the water and salt.
- NH3 = ammonia
- HCl = hydrochloric acid
- NaOCl = sodium hypochlorite (bleach)
- Cl = chlorine
- Cl2 = chlorine gas
- NH2Cl = chloramine
- N2H4 = hydrazine
- NaCl = sodium chloride or salt
- H2O = water
HCl will burn everything you know and love, and chlorine gas will just plain murder the shit out of you. There's a reason it was used during World War I as a chemical weapon, and it's the same reason it was banned by the Geneva Convention.
So yeah, anyway, ponies for those of you who haven't incinerated their lungs.