Maybe someday the shoe will be on the other foot.

VOA: special.2010.05.09

It is nor hand nor foot nor arm nor face nor any other part belonging to a man.

它又不是手又不是脚，又不是手臂又不是脸,又不是身体上任何其他的部分。

麻省理工公开课 - 固态化学导论课程节选

So,in a sense the shoe is really on the other foot,".

VOA: standard.2009.11.10

Many of their movies show scenes in which the actors chase each other in cars, or in airplanes or on foot.

VOA: special.2010.07.25