Cramer's lightning round: Tesla goes higher. Period

• 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.

Alcoa: "I don't like the metals here. I just think the metals are too hard a place to be. So I'm going to say no to that."

Livongo Health: "I say you keep it. .... Let's stick with it."

Oneok: "Oneok did get an upgrade today. ... I do happen to believe that the dividend looks good, but that whole group is really hurt."

Tesla: "Tesla goes higher. Period."

Xerox: "I think that's a mistake after what they did to try to buy HP. They embarrassed themselves. Let's go with some people with some dignity."

SunPower: "I'm not a fan. Not a fan of Sunpower. The best sun business is in Tesla."

Carnival Corp: "They had a tough interview today ... Anything's possible. I don't care for the industry."

Pinterest: "I thought that Pinterest was good, but they withdrew their guidance and everybody freaked up and they didn't like it. ... I think they're okay."

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