It's that time again! Jim Cramer rang the lightning round bell, which means he gave his take on caller favorite stocks at rapid speed:

American Water Works: "That's a buy. We love the fact that they are literally the kind of company that these municipalities have to pay in order to be able to get their water systems working."

Weight Watchers International: "No, not for me. Don't like that business model. There are better stories out there."

GW Pharmaceuticals: "I know that that was a great speculative one that we were involved with because I do think that they have the pure cannabis that doctors want to prescribe. If you want to hold on, it's a pure spec at this point. It's had a monster move."

Stryker Corp: "Stryker is okay but Zimmer Biomet, their competitor, is much better. I say sell, sell, sell Stryker and buy, buy, buy Zimmer Biomet."

Barrick Gold Corp: "No, you don't want to buy that one. You want to buy Randgold if you want to buy gold. That's the one to beat."

Air Lease Corp: "We are going to stay away from Air Lease. We don't want to be in that. If we are going to be in aerospace, we are going to be in United Technologies."

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