So Mom asks Michael Bublé if her kid can come up and sing with him, and Bublé decides to be cool about it, and then the kid sings.
What I love about this video is how long it takes Bublé to realize the kid can sing: about two seconds. (If you want to skip the preamble, start around 1:20.)
I showed YOU ARE SO UNDEAD to a cinematographer I'm working with. After literally 5 seconds, he said, "You shot this on the Red?"
I know I keep harping on how your query email has to impress inside of, literally, 3 seconds, and that just seems crazy unfair. And ditto for the maybe 5 pages someone will read of your screenplay if you're not paying for the read. But professionals can identify professional work in a tiny, tiny few seconds.
Yes, of course there are exceptions. Satyendra Nath Bose sent his paper to dozens of science journals and they all rejected him.
But then he got it to Einstein, who got it published, and further developed the Bose-Einstein condensate theory. But that only goes to suggest that the gatekeepers at the journals weren't professional enough, and that Einstein could read a physics paper like you or I would read the morning paper, and go either, "Hah! Ridiculous," or "Wow! That's so true!"