fart vortex

färt ˈvôrˌteks
Noun
After passing gas in bed, a pocket of air is manually created under the blankets (usually by lifting up a leg). Upon collapsing the blanket and pocket of air, a small exit tunnel is positioned towards you face for a full sensory experience.

I always look forward to my fart vortexes after eating sauerkraut and kielbasa.