What happens inside a wormhole?

In a previous article I wrote about how a wormhole would look like. I kind of left the post open to the reader’s imagination when thinking about the possibility of travelling through space or even between parallel universes. 
Well people, this post ruins everything, because according to the model proposed by John Wheeler in the ’60 there’s only one outcome in traveling through a wormhole: death.
As I wrote in my previous post (without elaborating), the model of a functioning wormhole is a Schwarzschild solution. 

Imagine two black holes set in distant parts of the Universe with their singularity points mirroring each other. On one side, the funnel between the event horizon and the singularity point of the black hole would squeeze everything and anything to such a degree, nothing could come through the other side, where the funnel from the event horizon to the singularity point would look pretty much the same. The immense gravity would tear everything apart. Not even light could cross to the other side of a wormhole. The movie Interstellar shows an artistic simulation of a cosmic travel between distant points in space, though, for obvious reasons, it takes a more bearable approach than the death of all of its characters. – Roman Alexander
The image below shows the wormhole inside the black hole in the movie Interstellar, considered to author the best depiction of a black hole to date.

(The question was originally asked by Nitin Karthik from Bangalore, India)