Elon Musk's Tesla-themed diner in Hollywood became the scene of an anti-Musk protest on Sunday. Protestors gathered outside the futuristic eatery with balloons resembling Musk that were animated to do Nazi salutes, in reference to a widely-criticized gesture that the tech billionaire made on President Donald Trump 's Inauguration Day.

Tesla’s diner is well suited for those fans in so deep it’s “like a cult,” Greenspan says—but the goal is to feed something bigger. “What makes a diner is hospitality,” he says. “It needs to feel comfortable, welcoming, and that’s really hard to do in a quick-service environment, especially when we’re serving you in your car.”