person A: I once almost ruined my husband's master's thesis presentation--something he needed to pass to get his degree.
person B: Oh no_comma_ what did you do?
person A: I started coughing--badly. He and everyone else stopped to look at me and make sure I was okay. He was so distracted after that!
person B: Don't worry_comma_ from what you said it doesn't sound like you almost ruined it. It wasn't something on purpose at least.