Every week, I take a look at a few companies that topped their profit targets. Leaving Wall Street's pros baffled can be a good thing. It usually means that the companies have more in the tank than analysts figured, and capital appreciation often follows.

Let's take a look at a few companies that humbled the prognosticators this past week.

We can start with General Mills (NYSE:GIS). The cereal giant earned $1.25 a share in its latest quarter, well ahead of both the $0.96 a share it earned a year ago, and Wall Street's profit target of $1.03 a share. Lower commodity prices played a key role in delivering healthier profit margins, but many of General Mills' food-churning peers still didn't fare this well.

Used car retailer CarMax (NYSE:KMX) was no lemon. Its haggle-free showrooms were hopping this past quarter, with comps up a crisp 8% as sales rose a healthy 13%. The real gem here is CarMax's profit of $0.46 a share. The pros were parked elsewhere, betting on just $0.18 a share in net income.

New-car retailers may be the obvious beneficiaries of this summer's "cash for clunkers" program, but used-car specialist CarMax and America's Car-Mart (NASDAQ:CRMT) have been more than up for the test drive.

Finally, Research In Motion (NASDAQ:RIMM) is calling in. The BlackBerry maker earned $1.03 a share in its latest quarter, beating out Mr. Market's best guess of $1.00. Apple's (NASDAQ:AAPL) iPhone and Palm's (NASDAQ:PALM) Pre may be the buzzworthy smartphones these days, but Research In Motion is still shipping out millions of new BlackBerry devices every quarter. A disappointing outlook hammered the stock on Friday, but the company's reach is undeniable.

So keep watching the companies that lap expectations. Over time, it will be a profitable experience for investors, as the market rewards the overachievers. That's the kind of surprise we look for in the Motley Fool Rule Breakers newsletter service. Want in? Check out a 30-day trial subscription.

Either way, come back next Monday to learn about more stocks that blew the market away.

Apple is a Motley Fool Stock Advisor selection. CarMax is a Motley Fool Inside Value recommendation. Try any of our Foolish newsletter services today, free for 30 days.

Longtime Fool contributor Rick Munarriz is a fan of toppers. He does not own shares in any of the companies in this story. He is also part of the Rule Breakers newsletter research team, seeking out tomorrow's ultimate growth stocks a day early. The Fool has a disclosure policy.