To silently flatulate into a cushioned seat, while simultaneously allowing the gassy substance to sift its way throughout the infrastructure of the bolster.
This action is then followed by violent (and often obscure) strikes to the seat. These strikes release the "enclosed odor".
The stench instantly overpowers surrounding air, causing uncomfortability to any one in the vicinity of the seat.
As Weston put the car into park, his friend then opened his door, violently began punching the seat, shut the car door, and ran.
Weston was entirely confused, but then quickly realized what had just happened. Instantly, Weston's sense of smell became susceptible to the instable odor of Harrisons flatulence.