Agreed. Remember that I'm referring to the 360 version, though. I know the other versions may be different, and so the awesomeness that is the Egg Beetle may not translate quite as well xD
But basically, you were speeding along some wooden catwalks and bridges in an African canopy, with Eggman in a giant mecha fire ant thing ahead of you, launching missles which explode in pillars of flame you need to weave and dodge past to get close enough to bonk him on the nose.
Then it would cut to a 2D angle, and have him launching slower missiles for you to jump and slide under, and then he would try to cheap shot you whilst your dodging. Quick enough, and you can dodge and smack him right back.
If thats not a Sonic Boss battle, then what is?