In the following video, Motley Fool analyst John Reeves gives us his weekly wrap-up, discussing three companies that cratered this week. He tells us how Herbalife (NYSE:HLF) took a big hit after one analyst came out and called it a pyramid scheme, tells us why Markel (NYSE:MKL) fell after announcing it would be buying Alterra Capital (NASDAQ:ALTE), and discusses Research In Motion (NASDAQ:RIMM), which had been back on the rise, but fell this week after news from its conference call, saying that the company's vital service revenue may come into question next year.