Cramer's lightning round: Buy Twitter despite imperfect quarter

• It's that time again! "Mad Money" host Jim Cramer rang the lightning round bell, which means he gave his take on callers' favorite stocks at rapid speed.

Twitter: "Yes, yes, look, Twitter did not have a perfect quarter. They are doing a little rationalization of the numbers. Those of us who have a lot of followers — I saw my followers drop by, I don't know, like 30,000. A lot of other people dropping, and, at the same time, the company did not really necessarily put out a good message, but it's now down so much that I think buy."  

Dominion Energy: "Which is why, Pam, we think it's still a buy. I have to tell you, I think that they're doing incredibly well." 

Caterpillar: "Well, I mean, that's why I've been recommending United Rentals. You get all the heavy equipment that — I don't use Caterpillar — all the heavy equipment exposure but it's domestic, and I think you need that because holy cow, a tweet destroys you. We had a  late-day tweet today and I think it costs [Caterpillar] pressure tomorrow. 

Watch the full lightning round:

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