Woah! I noticed something creepy when I remembered the great Sky Fortress, the best flying fortress of them all (but with no music from Flying Batteries :_( .) Act 1 ends in a plane, act 2 starts suddenly without a plane starting the action. Then act 3. Then we have da plane! The plane may have auto pilot!
Also the plane dropped off at Castlevania Zone Ac-, wait, I mean Sylvania Castle Zone Act 1, and they used it straight after Oil Desert, my favorite zone in all Sonic games. The plane with auto-pilot!
Agree or disagree? Also I feel like I'm the only one who played played the classics and love Sonic 4 Eps II over Eps I.