I was on a road trip once passing through PA and stopped at a rest stop along the highway to pee...
It was a large restroom and the urinals were on two walls about 10 - 12 on each wall... There was only one guy on the end of the other wall and I was on the far end of the row on the opposite wall (maximum buffer zone)....
He was already peeing when I came in and as I started to pee, he farted... Then I was able to muster up a large one and let it rip... Mine was way louder... :)
Not a word was spoken... He finished peeing first and walked out with his head hanging low looking at the floor in shame...