And,if you wish someone good night, you might say, "sleep tight -- don't let the bed bugs bite."

VOA: special.2009.06.28

There's a guy in about the fifth row there who's missed too much sleep, so somebody just nudge him. That's it, good.

第五排有一个同学,可能很缺乏睡眠吧,旁边的人把他叫醒吧

耶鲁公开课 - 博弈论课程节选