I had a history professor who would often use a similar preamble phrase. His was "And SO IT IS that we see that..."

It worked to get our attention partly because of the time it took to say all that, and partly because it was so idiosyncratic that it sorta became a running joke.

I remember one session in particular.

This was a summer class, and as such each class session was around 2 hours long. The professor would typically give us (and himself) a 10-minute break in the middle of the class, and generally if you hung around the room, he'd strike up a more casual conversation in the room.

This was also not long after Michael Jackson died. The conversation got onto him and his life and his mixed legacy of scandal, went on for a while, and somehow made its way to one student observing that (and I quote): "he lived the American dream – he started out as a poor black boy and grew up to be a rich white man."

The room sorta hung in uneasy suspense at how the professor would respond.

"...and SO IT IS that we see that the Mongol conquest...", he said, launching noticeably-abruptly (and with a bit of a knowing grin) back into the course material.

He was generally a good-natured dude like that. His voice sounded a little unusual, and I guess some students thought he sounded like Kermit the Frog. He came back into the room after a bathroom break once to find someone had drawn Kermit on the whiteboard behind where he usually stood when speaking. He saw it, stopped, visibly pondered what to do with it, and drew a speech bubble from Kermit saying something like "the Silk Road" (or whatever it was were about to cover; it's been quite a few years and I don't remember the specific topic).

> He saw it, stopped, visibly pondered what to do with it, and drew a speech bubble from Kermit saying something like "the Silk Road"

Optimal play from the professor.