Someones the professors say that they are going to close the poll but it is unclear if it will be in 10 or 40 seconds. Sometimes we haven't finished our answer and wonder if we will be able to finish our sentence or if we just have to stop and find a way to close the idea immediately. Also, sometimes professors simply end the poll without warning, and responses are submitted incomplete. Let the professor have a button to click when they want only 30 more seconds and show this timer to help the students finalize their submission.