Has a one night stand ever left you in the middle of sex or before?

I've heard that people can leave in the middle of an intimate moment. They can say things like "if his dick smells bad I'll leave ASAP". Does that really happen? Or like "she did something creepy so I left". Can anyone who has been through it tell me? I would like to hear from both sides :) What do you even do if something like that happens? I hope you understand the question my native language is not English.