We kinda know what happens if you get sucked into a black hole because of math (spaghettification, what outside observers would see, etc); can the same be said about worm holes? Would you even notice if you passed through one? What would they look like? What would someone watching someone else go through a wormhole look like?
Wait, are worn holes a real thing?
On paper, yeah. We haven’t found any, though. At least, not that I’ve heard. But black holes were the same deal when I was a kid. Then we found one.
Google for Einstein Rosen bridge.