Don't be a hurler on the ditch while I fix the car.
hurler on the ditch
idiomA person standing on the side of a hurling field issuing (unsolicited and usually unwanted) instructions to the hurlers.
It is hard to focus on the project when my manager acts like a hurler on the ditch.
The experienced captain ignored the hurler on the ditch who shouted unhelpful advice from the sidelines throughout the entire match.