| Clue | Source | Date |
|---|---|---|
| "Eyes up front!" | LA Times Daily | 15 Oct 2022 |
| Announcement start | New York Times | 21 Mar 2015 |
| Announcement start | ||
| It may precede some announcements | ||
| Start of many announcements | ||
| "Ahem ..." | ||
| Start of many public announcements | ||
| "Listen!" | ||
| "Listen up!" | ||
| "Listen!" | ||
| Teacher's opening remark to the class. |