Board Thread:Speculation House/@comment-4784525-20131010155204/@comment-96.52.197.51-20131012030228

Just because one kind of energy (such as kinetic energy due to Ruby's sneeze for example) triggers it doesn't mean that no other energy type can trigger it. It/s very likely that something as volatile as dust has many ways of activating it, and all of them may activate it in different ways. For example, the explosion we saw from the dust when Ruby sneezed may not be the only affect that particular dust could have. it's very possible it could be focussed an activated with an energy such as a person's aura into a fireball effect or may cause a lasting wall of flames if activated by intense heat.

To the point, it's very possible that aura can be used to activate the dust, but to this point there's been little if  any evidence to that effect.