| 2026-08-16 | Display some emotion, perhaps |
| 2026-04-27 | Flinch, say |
| 2025-03-06 | Gape or gasp, say |
| 2025-02-25 | Change, chemically |
| 2024-11-15 | Duck, say |
| 2024-10-28 | Respond to a stimulus |
| 2024-06-04 | Blink or jump, say |
| 2024-01-24 | Flinch, say |
| 2022-09-25 | Twitch, for instance |
| 2022-04-17 | Undergo a chemical change |
| 2022-01-30 | Laugh or cry, say |
| 2021-09-22 | Respond to a stimulus |
| 2021-01-23 | Flip, say |
| 2020-03-30 | DO something |
| 2020-03-16 | Blink or flinch, say |
| 2019-12-06 | Not just sit there |
| 2019-08-30 | What a person with a poker face doesn't do |
| 2019-07-14 | Flinch or twitch, say |
| 2019-04-24 | Undergo a chemical change |
| 2018-12-29 | Flinch, e.g. |
| 2018-09-04 | Respond to a stimulus |
| 2017-01-03 | Not be inert, as two chemical compounds |
| 2016-01-24 | Flinch, say |
| 2015-03-28 | Change color, maybe |
| 2013-06-27 | Not take it lying down |
| 2013-05-28 | Undergo a chemical transformation |
| 2013-01-12 | Ooh and aah, e.g. |
| 2012-09-08 | Turn another color, say |
| 2010-12-21 | Do a double-take, e.g. |
| 2010-06-10 | Not be deadpan |
| 2010-03-21 | Flinch, say |
| 2008-11-01 | Not keep a poker face |
| 2008-06-01 | Not just sit there |
| 2008-01-08 | Flinch, say |
| 2007-05-28 | Flinch or blink, say |
| 2007-04-11 | Do a double-take |
| 2007-01-25 | Change, chemically |
| 2006-07-26 | Strike back, say |
| 2006-04-16 | Change, chemically |
| 2004-09-09 | Don't just stand there |
| 2003-11-14 | Strike back, e.g. |
| 2003-05-06 | Strike back, say |
| 2003-01-29 | Flinch, say |
| 2002-10-06 | Jump at a noise, e.g. |
| 2002-05-26 | Make a move |
| 2001-11-19 | Respond to a stimulus |
| 2001-09-09 | Strike back |
| 2001-06-25 | Don't just stand there |
| 2000-11-23 | Flinch, say |
| 2000-04-25 | Strike back |
| 1999-08-29 | Push back, perhaps |
| 1999-06-23 | Change chemically |
| 1999-03-14 | Flinch, say |
| 1998-12-16 | Do something |
| 1998-06-08 | Take countermeasures |
| 1998-03-04 | Do a double take, e.g. |
| 1997-12-18 | Slam on the brakes, e.g. |
| 1996-12-03 | Don't just stand there |
| 1996-04-06 | Not lead |
| 1995-10-11 | Be moved by a stimulus |
| 1994-10-30 | Start, in a way |
| 1994-07-06 | Do a double-take, e.g. |
| 1994-06-27 | Show shock, e.g. |
| 1994-01-06 | Get even, in a way |
| 1993-12-12 | Respond to a provocation |