一看電影就打瞌睡

Cinematic narcolepsy is the chronic involuntary sleep condition induced by viewing movies, particularly those shown on a large screen.

電影嗜睡癥指因為觀看電影，尤其是那些在大屏幕上放映的電影，而引起的習慣性、不由自主地睡著的情況。

例句：

Had I known my date had cinematic narcolepsy, I wouldn't have paid for her to take a nine-dollar nap.

要是知道約會對象有電影嗜睡癥，我才不會花9美元買電影票。