The man who designed the menacing 'euthanasia rollercoaster' is working on more rides.

Back in 2010, designer Julijonas Urbonas, from Lithuania, was project lead of the infamous 'euthanasia rollercoaster'.

The horrifyingly hypothetical ride is designed to 'take the life of a human being' with 'elegance and euphoria', he says.

The idea is that the passenger would experience a series of loops, which get smaller and smaller as it progresses, which will eventually lead to death.

TikToker @ridesnslides - who has created a realistic simulation of the ride - has explained how it works.

"The train would plummet over the side of the hill, hurtling down at a speed of 360kmh, close to its terminal velocity," they said.

TikTok/@ridesnslides

"After the 500-metre initial drop, the track flattens out and begins the first of seven inversions in a row. And this is the deadly part.

"It would take 60 seconds for the train to go through all seven of these inversions, and each inversion gets a gradually smaller and smaller diameter in order to maintain 10Gs of force to all the passengers during the entire 60-second experience."

According to Urbonas' website: "Riding the coaster's track, the rider is subjected to a series of intensive motion elements that induce various unique experiences: from euphoria to thrill, and from tunnel vision to loss of consciousness, and, eventually, death."

"From there, you would begin experiencing a blackout and ultimately you would eventually lose consciousness and die."

The project, which was awarded the Public Prize of New Technological Art of Update 2013, has since become a 'unique media phenomenon'.

Julijonas Urbonas

And more recently at the Milano Triennale 2022, Urbonas revealed his latest project - When Accelerators Turn into Sweaters.

This ride happens to is a full-scale replica of one of the Large Hadron Collider parts that 'weaves superconducting fibers into sweater-like knit-work'.

He also revealed that he is working on new amusement park rides.

When asked about being a 'director of an amusement park' in the past, Urbonas explained: "Yes, and I’m still a director of a company that, well, is not producing yet, but working on the prototypes of future amusement rides. It’s very complicated.

"I have been working already for 15 years on some amusement rides, and still we are in the state of prototyping.

"It’s really difficult to move bodies in space.

"I mean, in some way it’s easy, but what is difficult is to make it public.

"You have to go through all kinds of institutions to get certificates and so on. Lots of testing."