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NEW YORK ( TheStreet) -- Here's what Jim Cramer had to say about some of the stocks callers offered up during the "Mad Money Lightning Round" last night: SolarCity ( SCTY): "It's a very interesting play. I think it works." Westport Innovations ( WPRT): "I like it as a speculation but I think natural gas as a surface fuel is still years away." Amarin ( AMRN): "I think there's too much hot money in it." United Technologies ( UTX): "I think that stock is terrific. That's the best way to play aerospace along with Honeywell ( HON)." Cheniere Energy ( LNG): "I'd pull the trigger between $17 and $18. " Opko Health ( OPK): "I say the stock is going higher. Don't chase it, wait for a pullback." Chevron ( CVX): "I think the stock has big upside. " To read a full recap of "Mad Money" on CNBC, click here. To sign up for Jim Cramer's free Booyah! newsletter with all of his latest articles and videos please click here. To watch replays of Cramer's video segments, visit the Mad Money page on CNBC. -- Written by Scott Rutt in Washington, D.C. To email Scott about this article, click here: Scott Rutt Follow Scott on Twitter @ScottRutt or get updates on Facebook, ScottRuttDC