Yes it is. You'll find a slice of pie, and a few other objects, in almost all of the Bizarro comics.
Is that a pie in the top right seats?
I love that Bizarro is still going strong. Dan Piraro has his own website which he updates frequently with eyecandy.
If I remember correctly, in every Bizarro comic, you will find all or some combination of the following: A slice of pie A UFO w/a little alien inside A stick of dynamite An upside-down bird
Opera fan here, and this is funnier than I thought it would be XP
That story would make one badass opera.