What's the scientific reason my farts follow me around?

When I'm working in the small construction trailer, the guys want me to go outside to fart. They enjoy fresh air rather than my wofted sh*t particles. Sometimes I have to wait outside for 5 minutes to ensure that the fart smell doesn't follow me back in. Waving my hand by my doesn't seem to work. Any tips? I'm losing productivity at work. Half the day is spent waving my hand by my rectum!