Cubicle coworkers farting

I work in a cubicle. I had a question for the guy next to me and when I rolled over to him he was bent over with his face in his crotch taking in one of the most intense sniffs. I rolled back to observe. He let out an "ahhhhhh" afterwards. I guess he couldn't get enough so he started fanning it into his nostrils. Later that day he was giving a presentation to the group. He started getting a nosebleed. It was coming out fast so he started running to get tissues. He ended up tripping on a chair leg and his face landed on a girls thigh. This not only blood-stained her dress but it also smeared blood all over his face.

To top it off, he got up and tried to play it off by saying "I'm alright, I'm alright" while waving to the crowd while blood was profusely coming out of his nose and smeared all over his face.