Who races home to fart? You always have a pretty good idea ahead of time if there's potential for a shart situation, so why not just rip it in the car like everyone else?
If you think there's a shart coming, of course you hold it. I had a dicey situation this morning while waiting in the parking lot of the vet's office. Let's just say I just made it home in time and am glad I had a long coat on