Cramer's lightning round: Align Technology is the 'quintessential selfie stock'

• 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.

Oscar Health: "I don't need Oscar Health ... because UnitedHealth reported an unbelievable quarter the other day that had no flies on it. You buy UNH."

Align Technology: "I've been saying that it's too late for a long time, and it's not ... because this is the quintessential selfie stock ... All people want is to look good and feel good, and Align does that."

Inseego: "Down here at $8, I don't want you to be a seller. Enough is enough. I'm not saying buy, but not selling it down here."

Luminar Technologies: 'I'm a little gunshy, given the fact that we can't seem to get the technology right. I put that one in the more of a long-range camp, not anything near term."

Tattooed Chef: "I'm not going to be against it. I am for Tattooed Chef, but not aggressive. It's very expensive."

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