The members of Somaliland's Lower House of Parliament introduced a motion to impeach the president this weekend, which if successfully passed by the majority would require a two-thirds vote in the Upper House of Parliament to finish the impeachment.

VOA: standard.2009.09.07

So this weekend a penalty was missed exactly by somebody ignoring this rule.

这周末的点球未射进,绝对是因为罚球球员不懂这个规律

耶鲁公开课 - 博弈论课程节选