Turning the handlebars makes the wheel elliptical

The artist is talking to the cyclist.

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Cyclist: Can I use the bicycle?

Artist: Wait a moment. I’m trying to see what happens when you turn the handlebars to the right.

Cyclist: The bicycle turns to the right?

Artist: I want to see what happens to the wheel. See? It turns elliptical. And the right handlebar goes up and the left handlebar comes up.

Cyclist: It doesn’t feel like that when you’re riding it.

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Voiceover

Sometimes a mundane shopping excursion intrudes on the creation of great art. Attempts at humor by the would-be cyclist are lost in the pursuit of an elliptical bicycle wheel.

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