Cramer's lightning round: Do not buy Xos Inc.

• 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.

Nano Dimension: "I'll just tell you this: I do not like the 3D printing business. It's a faddish business. People ignited [3D Systems Corporation] at one point, but this one I don't have that much hope for, to be honest."

Xos Inc.: "Mobility solutions, we've heard people on these. We got excited about them like everybody else, and we couldn't make money for you, so I'm going to say no."

Sharecare: "My hope is they report a blowout quarter, because they need to get back $10. I think they can do it, but we've got to see the quarter first."

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