Turning the handlebars makes the wheel elliptical

The artist is talking to the cyclist.

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 down and the left handlebar comes up.

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