That also reminds me of a joke.
A boy goes to pick up his date but has a lot of gas on his stomach. The father meets the boy at the door, and offers the boy a chair where a dog is lying under then waits with him while the girl is getting ready. As he is sitting there, he slips out a little one, hoping no one will hear or smell it. The dog's name is Rastus, and in a disgusting voice, the father says "Rastus!". The boy thinks to himself, good he thinks it is the dog, so this time he lets out a bigger one. Again, the father in a louder and more disgusting voice says "Rastus!" Thinking he is safe, the boy let's it all go that has been building up.
The father yells "Rastus!, get the hell out from underneath him before he shits on you!"