During the first week of December 2025, Tesla’s humanoid robot, named Optimus, offered two very different faces. The first was that of a triumphant machine. The second, that of a machine collapsing. The most interesting aspect is not the fall itself: it is that these two images were produced almost at the same time, and that they may perhaps tell the same story of staging.

Monday, the running robot

On 3 December 2025, Tesla published a video showing Optimus running without a hitch on the floor of a laboratory, with both feet leaving the ground, according to the specialist website Interesting Engineering. Running, for a two-legged robot, is nothing trivial: it requires managing balance with every stride, that moment when no foot touches the ground. Elon Musk, the head of Tesla, shared the clip himself on the social network X with a laconic caption: Running robot (running robot), still according to the same source.

The same video, reports Interesting Engineering, highlights improved balance and gait. In short, the image of mastered progress, filmed under chosen conditions.

A few days later, the falling robot

Change of scene. During a public demonstration in Miami, on 8 December 2025, Optimus distributed water bottles to those present… and fell, again according to Interesting Engineering. Until then, a robot falling in public can happen and is nothing scandalous.

Except that one detail set the powder keg off. While falling, the robot reportedly brought its hands to its face, in a gesture that observers interpreted as that of a human teleoperator removing a virtual reality headset, according to the same source. The word dropped, doubt settles in: what if, behind Optimus, a human was piloting the machine remotely?

What exactly is teleoperation?

A word of explanation to get one’s bearings. We speak of teleoperation when a person controls the robot remotely, somewhat like a high-tech puppet, often while wearing a virtual reality headset and sensors that transmit their gestures to the machine. Conversely, a robot said to be autonomous decides its own movements thanks to its artificial intelligence. The difference is enormous: a teleoperated robot impresses, but does not prove that it knows how to manage on its own.

The point that bothers: Tesla had already sworn otherwise

And that is where the two images meet. Because this is not the first time the question has been raised. According to Interesting Engineering, Elon Musk had previously dismissed accusations of remote piloting concerning Optimus, by stating that a kung-fu demonstration was a matter of artificial intelligence and not teleoperation.

So we have, on one side, a polished clip where the robot runs on its own; on the other, a live fall where a gesture looks strikingly like that of a human pilot. And in between, a previous denial from the head of the company. Interesting Engineering also points out that the running video of 3 December, which boasts of better balance, contrasts directly with the images of the Miami fall.

Why this matters to you

Let us retain the underlying subject, beyond the anecdote. A video of a robot running, filmed in a laboratory, is a communication image: one chooses the set, the angle, the moment. A public fall, however, escapes control. When the same gesture, that of removing a headset, comes to blur the boundary between an autonomous robot and a remote-controlled robot, the question is no longer whether Optimus fell. It is to know what, in all that Tesla shows us, actually works on its own.

To date, none of this information rests on a verifiable and independent demonstration clearly distinguishing what is autonomous from what is piloted. It is precisely this ambiguity that turns a banal fall into a real question. Until proof arrives, the right reflex remains the same when facing any spectacular robot video: to ask who, or what, is truly in control.