O. Sami Saydjari wrote:

As I was coming into Grand Rapids (KGRR) yesterday, the controller
announced that there was a "level 5" return (or perhaps she said "cell")
on final to runway 8, so I was vectored to 35 where there were mostly
"just level 4" stuff.

That's pretty funny because even the airlines ain't flying thru a level
four return on final.