• 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.

Nokia Corp: "I am hearing nothing but positives of late, for the last four weeks, about Nokia. ... I think it's right to buy."

Alliance Resource Partners LP: "I think coal's at a decent price. ... I think they can make that yield."

SoFi Technologies Inc: "I'm not going to say sell the company here."

Iron Mountain Inc: "I've been behind it because I like that dividend. ... I think you're okay in it."

Tattooed Chef Inc: "That's a very hard call. Doesn't make money, and I'm not currently recommending stocks that don't make money."

Intrepid Potash Inc: "I am very worried about that industry because I've seen the prices of corn and wheat have been going down. And soy."

CRISPR Therapeutics Inc: "I'm not going to bet against anyone who wants to be part of CRISPR technology, because it could be great."

Berkshire Hathaway Inc: "Absolutely [continue to hold]. ... The assets are terrific."

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