Cramer's lightning round: People doubted this stock, but they're wrong

• It's that time again! "Mad Money" host Jim Cramer rings the lightning round bell, which means he's giving his answers to callers' stock questions at rapid speed.

Amgen: "I am not going to recommend this stock here."

Sarepta Therapeutics: "I think they're brilliant. I think they've got the right combination. I think that a lot of people doubted them. I think those people are wrong."

Wingstop: "Wingstop is one terrific stock."

Regenxbio: "I will have to do some homework on that."

Visa: "Visa's fantastic."

WP Carey: "It's O. K. That's all I'm going to say."

WATCH: Cramer's lighting round

Disclosure: Cramer's charitable trust owns shares of Amgen.

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