About 15 seconds. I was in a long meeting and felt the tight pains of gas building up to my asshole over the next two hours. A break was just a few minutes away but I could hardly hold it. I felt like I was going to shit my pants, the buildup was just that intense. Then I felt my asshole starting to give so I pretended I had a call (by having it on silent) and ran out of the room and down to the restroom which fortunately was close by. Then once I went inside the restroom, I let out a long fart (that was dry thankfully) that was loud but no smell. The pain and relief I felt was glorious. I didn't make it to the stall but fuck it, I couldn't take it anymore.
Whoever decided to have a long meeting and fails to schedule a break every 90 minutes needs to be shot. Fuck you assholes.