Stephen-Hawking
Physicist Stephen Hawking sits on stage during an announcement of the Breakthrough Starshot initiative with investor Yuri Milner in New York, April 12, 2016. Lucas Jackson/Reuters

Stephen Hawking made an appearance in Hong Kong to discuss President Donald Trump and Brexit and he did it without having to travel anywhere.

The Brief History of Time author, cosmologist and Cambridge professor appeared to the audience of hundreds at an “Evening with Stephen Hawking” event on Friday as a “HumaGram,” or human hologram, to deliver his remarks, according to the Independent.

Read: 10 facts about world-renowned theoretical physicist Stephen Hawking

The HumaGram is 3D interactive holographic technology developed by the company ARHT Media. The technology can be used life or can be prerecorded and is then only visible to audience members wearing a special pair of glasses.

Hawking, who has ALS, used his speech aiding computer to discuss Donald Trump and Brexit saying that between the two, “we are witnessing a global revolt against experts,” according to the Independent. “I am delighted to have the opportunity to use ARHT media’s hologram technology to transcend time and space to be with you today,” Hawking began.

Hawking previously used the technology for an appearance in 2015. The cosmologist has warned in the past that the relationship between humans and AI is a potentially dangerous one if not traversed properly and believes humans have no more than 1,000 years left on Earth.

Attendees of the event posted photos of the HumaGram Hawking to Twitter.