In Chinese culture, sleep paralysis is widely known as "鬼壓身/鬼压身" (pinyin: guǐ yā shēn) or "鬼壓床/鬼压床" (pinyin: guǐ yā chuáng), which literally translate into "ghost pressing on body" or "ghost pressing on bed." A more modern term is "夢魘/梦魇" (pinyin: mèng yǎn).

Source: http://en.wikipedia.org/wiki/Sleep_paralysis

 

I never experienced this before as far as I can remember. Hmm….