Back on the farting topic; I managed to get a much louder high load fart on my way to work today. I was driving at like 50-ish kph (30mph) in Sport mode and with the gearbox in manual, I then punched it and got a kick-down, must've been to 2nd gear or so. When I shifted I swear I heard a fart out the exhaust, a loud one too. I'll try to recreate a similar situation today or tomorrow to see if I can do it again.