In what scene with Poirot would you have lost your temper?

We all love our dapper detective, but he does have a lot of little quirks, preferences and pride. In what scene (book or movie) or scenario would have been too much for you?

I was just watching the scene from Triangle at Rhodes where Poirot is unpacking and repacking *everything* the maid is doing and I thought I'd have snapped back and told him to pack is own damn bags. haha. What's yours?