Jimmy Fallon on Wednesday was curious about the “interesting” way Donald Trump stood during a recent talk with reporters. And he had jokes.

A video shared by Trump communications adviser Margo Martin showed the president looking as if his legs were about to cave in.

Fallon also wanted to know.

Showing a photo of Trump in his curious stance, Fallon said, “How do you do that?”

Fallon continued, “It’s like a Jerry Lewis B-side,” impersonating the late comic’s uncoordinated physical humor.

The host zinged again, saying:

“It looks like one of those toy giraffes that collapses when you press the bottom of it.”