All because of these potential reactions when mixed with Household Bleach:
Ammonia + Bleach = Chlorine Gas, it mixes with the water in your lungs and then becomes hydrochloric acid and you know the rest.
More bleach than ammonia= Nitrogen Triglyceride, a very unstable compound, I.E. Highly reactive, also poisonous, but by them time it would hit your mouth it would already have exploded.
More Ammonia than bleach= a self igniting form of rocket fuel.
This is all because of a Sodium Oxygen and Chlorine chemical called Sodium Hypochlorite in household bleach. These reactions are all using household ammonia, now consider it with pure ammonia and the strength of these reaction is increase.
DO NOT MIX THESE TO COMPOUNDS TO EXPERIMENT! ODDS ARE YOU WILL DIE, OR BE SEVERELY INJURED.
<img src="http://www.compwefix.net/public_html/compsi/sig.jpg" width=940 height=148>