15sJAMirror Doppelganger Horror Short with Reversed Reflection
A 15-second horror-suspense short in which a woman brushing her hair notices her mirror reflection moving in reverse and half a beat late. The reflection gradually takes control, grabbing her wrist and pulling her through, ending with two identical versions of her in the mirror.
John @johnAGI168
Prompt (original, unmodified)
【风格】惊悚悬疑氛围短剧，暖黄居家光与冷蓝镜面光对撞，胶片颗粒，呼吸感静默。 【时长】15秒 【角色】对镜梳妆的女子（居家睡衣，素颜，慵懒）。 [00:00-00:03] 镜头1：过肩拍镜子。女子坐在梳妆镜前梳头，画面温馨日常。镜头极慢推进——观众先于她发现：镜子里的她，梳头的手是反的，而且慢了半拍。 【钩子点】日常画面里藏一处"说不出哪不对"，逼观众盯着找。 [00:03-00:09] 镜头2：正反打。现实中的她放下梳子，镜中的她却又梳了一下才停。她终于察觉，缓缓抬眼直视镜子。镜中的"自己"也抬眼——但镜中人的微笑早她一秒出现。 [00:09-00:15] 镜头3：极近特写双眼。她屏住呼吸伸手去碰镜面，指尖将触未触的瞬间，镜中的手反客为主，一把抓住她的手腕往里拉。最后一帧：现实的椅子空了，镜子里坐着两个一模一样的她，其中一个在笑。 【对白口型指导】镜中人（口型）："换我出来透透气。"
Reproduced verbatim from the original post. Never edited or translated. Everything outside this block is our own commentary.
How this prompt compares
The techniques this prompt uses are more common in short film prompts than in the library overall:
| Technique | In short film | Library average | Lift |
|---|---|---|---|
| static/fixed | 12% | 8% | 1.45x |
| slow push-in | 10% | 8% | 1.27x |
| cool tone | 11% | 8% | 1.4x |
| low-key | 23% | 17% | 1.38x |
Across all 5,926 prompts, the techniques used here appear at: close-up 40%, warm tone 17%, low-key 17%, static/fixed 8%.
The 15s duration is not arbitrary: 71% of the prompts in this library that state a duration ask for exactly 15 seconds — Seedance 2.0 accepts clips up to 15 seconds, so 15s is the model's ceiling and the most common choice.
