it wouldn't have bothered me so much if she hadn't touched me while i was running to ask me to "run a bit slower" because the treadmill was making too much noise and she couldn't hear her sister properly on the phone. This really happened??? This is a well expressed, fantastic post, but I swear, I almost thought it was a fake when I read this line and didn't see that you WENT OFF ON HER. EFF them!! They pollute EVERYTHING  Some people are non confrontational by nature or upbringing. Others, like me, enjoy it. I can empathize that that sucks, as I've seen too many people get put into these awkward situations, very often by fats, and don't quite have the tools to handle it and correct the other individual who is very clearly in the wrong. I'm surprised I've made it as long as I have without any major incidents, as I will go off on someone, whether it's while I'm out on a run, or were OP's situation occur with me at the gym. On the road I have to get loud and yell, being outside with vehicles and all that. In places like a store, the gym, etc., I can usually get the effect across in a very deliberate manner of clear speech, usually a lower tone, almost pedantic, that has been in the toolbox of NCOs for generations. If you glare straight into someone's eyes and calmly, deliberately tell them exactly how much of a piece of shit they are and you can only hope they die of a massive myocardial infarction while shambling across the parking lot and how much better the world and their family would be without them, it has an amazing effect. You've just got to get creative. The main thing is to remain absolutely calm and maintain eye contact. Two counter-intuitive responses for a situation like that, but, oh, does it make people uncomfortable as fuck, whether it's the 20something fat bitch and her rotten crotch fruit bumping into your grocery cart, or the 40something fat fuck who's normally loud and thinks he's a tough guy, they all get nervous. Although it does occasionally cause a scene and sometimes you're asked to leave a store, but it's worth it. Personally, I wouldn't stop until the butterball was fighting back greasy tears and packing up to leave, although it would likely be trying to salvage the situation with the righteous indignation they somehow manage to all possess. I fucking hate fats. They ruin everything for everyone.