Baltimore Bombscare
In the midst of receiving a rimjob, the receiver of the ass licking quickly grabs the rimmer by both ears, pulling her forcefully against his asshole and promptly farts in her mouth. Roles/genders can be switched/modified to fit the preferences of both the giver and receiver.
She tried to stick a brush handle up my ass while giving me a rimjob, so I worked up some gas and gave her a Baltimore Bombscare.