Cramer's 'Mad Money' Recap: Stocks When They Sizzle

Although there are people who believe that NightHawk's business is easy to do, Berger said the company has recruited "world-class" U.S. radiologists who trained at schools like Harvard and Stanford.

Also, "it's very difficult to scale these sort things," he went on to say. "A key ingredient is efficiency. We have our own work-flow technology that enables our physicians to be extraordinarily efficient."

Cramer said he likes NightHawk's story but is not against ringing the register, just because he is "tired of having to defend a stock that has been such a big win" and that investors aren't so hot on.

To view Cramer's interview with Dr. Berger, please click here.

Lightning Round

Cramer was bullish on Cemex (CX Quote), BEA Systems (BEAS Quote), Cisco (CSCO Quote), Allegheny Technologies (ATI Quote), Occidental Petroleum (OXY Quote) , Exxon Mobil (XOM Quote), Chevron (CVX Quote) and Devon Energy (DVN Quote).

Cramer was bearish on Smith & Wesson (SWHC Quote), JDSU (JDSU Quote), Ciena (CIEN Quote) and Allied Waste (AW Quote).

For more of Cramer's insights during the most recent Lightning Round, click here.

Want more Cramer? Check out Jim's rules and commandments for investing from his latest book by clicking here.