A classical "critical incident", familiar to students from southern Europe in England...

From S. Truscott & J. Morley, "Cross-cultural learning through computer-mediated communication", Language learning journal, 2001:24, 17-23.
In the article, the authors describe an intercultural sensitivity seminar conducted at the University of Manchester (U.K.) using an Internet forum and the study of typical "critical incidents" such as the one that follows.