Me best guess I've heard so far is an airborne dust containing some violent hallucinogen.

Lower atmosphere: This is a warm region affected by heat from airborne dust and from the ground.

An excess of them may attract airborne dust or even moulds.

During one storm in 1934, more than 350 tons of airborne dust was galloping across the prairie.

When asbestos fibers can easily be made into airborne dust, the material is known as friable.

When the fan is used to speed up heat transfer, the air circulation will increase the amount of airborne dust in the heated room.

These downloadable videos demonstrate the dangers to be aware of when working with airborne dust.

Reduce airborne dust and prevent scattering by moistening with water.

Both processes are susceptible to contamination from airborne dust.

This resulted in a great increase in the levels of caesium-137 in airborne dust.