OMG, something similar happened to me. We were just finishing a group trail ride and we walked into the arena for a bit. Most of us were just sitting on our horses chatting , but a few were practicing jumping. A big cloud of dust picked up (the arena is sand and is outdoors) I'm not sure if it was from the wind or the other riders jumping, but my horse inhaled some of it and started coughing. While he was coughing he ripped the BIGGEST fart!!! If it wasn't bad enough our trainer said loudly, "Geez Gaylen, that was rude!" Everyone started cracking up, I wanted to crawl in a hole and die. I laugh about it now, but that day I was mortified.