So .. uh this one is pretty straightforward, and cursed at the same time.
I trained it on cats photobombing people in the foreground and its pretty good at that, usually.
It has other usage cases which examples may show..
syntax is pretty flexible, if cursed is your definition of flexible. Works best with animals
x foreground blurry, y in background
or
x person face foreground blurry, y background
close-up might help, meme, parody, etc