I used to work in an office which was equiped with a "Fart Lock".
Two fire doors, about 8 feet apart in a narrow corridor. Each door was equiped with a window for our viewing pleasure and the fire door seals were like tupperware, they could keep a guff fresh for a good hour.
We would find a likely candidate from our team (usualy our manager who was world renowned for the putrid collection of dead rats he kept up his a**e) to go into the fart lock, deploy the H2S, burst the bubble (this is vital if you don't want it to be carried back to your desk clinging to your leg and usualy takes the form of "doing a little dance" on the spot.) and finally exit the fart lock without disturbing too much air.
Then just sit and wait for a victim. They usualy made it half way through before their face would melt but by then it was too late, the first door had swung shut behind them. Nothing left to do but claw at the window and slide to the floor