That was until May 10, 2006, recalled Cramer, when Hansen stock split five-for-one, but was also picked up by Goldman Sachs ( GS), the fourth analyst to begin coverage. After Goldman brought Hansen into the spotlight, Cramer said the stock immediately started to cool off, as it had hit that critical mass of analyst coverage. Small momentum stocks are worth owning, said Cramer, but when investors see analysts jumping on the bandwagon, it's time to get out. --Written by Scott Rutt in Washington, D.C. To contact the writer of this article, click here: Scott Rutt. To follow the writer on Twitter, go to http://twitter.com/scottrutt. To submit a news tip, send an email to: email@example.com. To watch replays of Cramer's video segments, visit the Mad Money page on CNBC.