TEHRAN, Young Journalists Club (YJC) - The not-for-sale prototype serves as a proxy for more oblique Trump-bashing heard at the annual tech fair.
"It would be better if I could use my hands and feet. I think the hammer isn't satisfying enough," one attendee said after sending the presidential noggin lurching back and forth.
"I don't have a good impression of him to be frank, because he's not very friendly to China now."
The trade show, which is organised by the US Consumer Technology Association (CTA), opened this week under the shadow of the escalating trade war.
The United States and China the have hit each other with steep tariffs on more than $360 billion in bilateral trade, rattling financial markets and business confidence.