Maybe they just realized that it was the time to call in some help? As for the monsters, it seems logical that if those who brought us here knew that would happen, then they wouldn't have done so.

[A pause, and a sigh of his own.]

Of course, not all people are entirely logical...

[A second pause, then his tone gets a bit more chipper.]

Don't worry about it - there's nothing wrong with trying to understand something that you don't. That's how progress gets made!