Unknown tracing action

Hello,
Would anyone know what was the first action performed in this YouTube video is, regarding the way he has traced the outer shape into a 3D object? I have tried using the flow tools but have failed numerous times, and I cannot find an answer anywhere. Thank you.

Hi, possibly Revolve around a central axis.

Thank you so much. Sorry, it is my first time using Rhino

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No need to apologize. Have fun with Rhino. The forum here is usually very helpful if you have questions.

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Hello again. I am having difficulties with the second action completed, involving the smash command. When he copies the revolved surface, he smashes it all as one piece. However, when I go to smash the surface, I can only select one surface (image below). Even if I smash each piece individually, I cannot manage to piece them together. Any solution to this? Thank you.