In your opinion. What would be more scary, an Extraterrestrial invasion, Zombie invasion, Interdimensional Invasion, or Super AI taking over?

Of course all of this is hypothetical. Especially the Interdimensional part.

Since there isn't any evidence of extra dimensions yet. We don't even know that much about the fourth dimension (time). So we wouldn't know how beings would look in the 5th dimension or something. Could we even comprehend that?

And also people tend to use Extraterrestrial and Interdimensional interchangeably anyway.

But despite all that. I still think this is a fun question though.