# Reactions arrive late

People and places / Expression / Direction rules. Checked 2026-10-13.

Timing that feels live: people react like people, not like a chorus.

- Use when: Dialogue, group scenes, creator content.
- Phrase: the reaction arrives half a beat after the line, the smile starts small and grows, the people in the background react at different moments
- Page: https://directorchair.ai/expression/late-reactions
- JSON: https://directorchair.ai/api/expression/late-reactions.json

## Watch out

- Extras who react in sync are a strong AI tell. Give the background people their own small actions. (vendor; Higgsfield's tested UGC prompt via Director Chair field notes on video prompting)

## Prompts

### Seedance 2.5

```
Scene: [your subject] in [your setting].
Shot 1 (0:00 to 0:05): the reaction arrives half a beat after the line, the smile starts small and grows, the people in the background react at different moments
```

### Seedance 2.0

```
Scene: [your subject] in [your setting].
Shot 1: the reaction arrives half a beat after the line, the smile starts small and grows, the people in the background react at different moments
```

### Kling 3.0

```
[your subject]. The reaction arrives half a beat after the line, the smile starts small and grows, the people in the background react at different moments. The scene is [your setting].
```

### Veo 3.1

```
[your subject] in [your setting]. The reaction arrives half a beat after the line, the smile starts small and grows, the people in the background react at different moments. Framing and subject stay as in the start image.
```

## Goes well with

- The listener acts too: https://directorchair.ai/expression/listener-acts
- Emotion as behaviour: https://directorchair.ai/expression/emotion-as-behaviour

## Source

Rules from Director Chair field notes on video prompting

Text CC BY 4.0, Director Chair (directorchair.ai). Reference clips and their card texts belong to their makers.