Assuming this isn't AI gen or Photoshop, probably backed up, reached the bollard, kept reversing forcing the car to go up because it can't go back, eventually got car over, bollard pierces car bottom as the car frame gets past and it's weight forces it down.
Stupidity in short, maybe intentional. I don't believe the story. I don't know if I even believe the photo.
Either AI has gotten better, the person who photoshopped it was really dedicated, or based on the dent and paint transfer on the back the person backed up fast and rode the post up then dropped down on top of it.
A different person posted that they found this image(reverse search) attached to a number of tweets this month. So the caption is 100% fake
I'd guess they had found a pole that had its top sawed off by somebody who wanted access, and got the idea for this post, arranging it to make the apparent protrusion without photo editing.
I kinda figure that the pole isn't secure in the ground, like whoever installed it did it poorly and not deep enough into the ground. When you back up into it, it begins to tip over until you have the top under the car. When you try going forward, it rights itself. I've seen something similar with different kinds of poles and when they are upright, they look completely fine.
I figure that if you backed up with enough force to drive up the pole, the bumper would be more damaged.