But now, when you have a moving object (my body) we need a force to stop that momentum. Where does that force come from?

Nobody said it's teleporting the whole body. But that was my only explanation of how something can move without speed.

But great, that's what I wanted to clarify the whole time. I think my explanations were too complicated, sorry.

So, taking your example:

When the portal falls on me - as soon as it reaches my neck. Only my head is coming out of the other portal, literally right above the ground. Correct?

As the portal keeps falling down, more and more of my body comes out of the other portal until my whole body is out of it. Correct?

Which leads to the fact that my head was moving from right above the ground to the height of my body. Correct?

So my head moves upwards. And since it takes time for my head to move upwards, we can measure the speed of my head moving upwards. Wouldn't you agree?

So, you say, they are moving without speed. Which could only mean when one person touches the portal in one millisecond, his complete body just disappears completely from the rails and in the same millisecond his body appears behind the other portal.

That's not how portals in the game work. That's rather how the transporter in Star Trek works.

Yes. And you said it correctly: they are moved through space. Now tell me: at which speed are they moved through space?

That's not what I mean. Let's just look at one person: the person will not just appear as a whole at the blue portal, right? First there will be, I don't know, the left arm, then the left side of the torso, the middle part... and so on. That's what I meant with centimeter by centimeter, atom by atom - pushing through the portal. Would you agree?

At least that's how it's in the game. It's not that you are touching one portal, despawn and appear at the other portal, right?

Of course I see the orange portal moving. So we agree the orange portal is moving, the blue is stationary.

So, when you're saying "the people just pop out the other side". What does that mean? Do they pop out one by one? So one moment, no one is there, the next moment one person spawns and after that the third person spawns? Or do they spawn altogether? Or does each person come from the portal centimeter by centimeter, atom by atom - pushing through the portal?

(Ich würde mir ja einen machen, aber das versuche ich schon seit einer Woche und es lädt immer unendlich lang.)

Habe es einige Male mobil versucht und hatte dort das gleiche Problem. Auf dem Desktop hat's dann funktioniert.