Found this post interesting:
Cobra Electronics stock plummets following profit attributed to tax adjustment
by Shannon Bond
Oct 24, 2007
Shares of Chicago-based Cobra Electronics Corp. plunged 10 percent Wednesday after the company reported a profit solely from a favorable tax adjustment, missing its solo analyst's estimate by half, and predicted a down fourth quarter.
Cobra said its 8 percent rise in income was mostly due to a tax benefit. A 42 percent jump in operating expenses offset sales growth.