Hey Guys ! I discovered that you can kickflip out of the extralevel ceilings. I got on top of the map in every chapter possible (cube in extra level) and realized that you can get the cube with you. Sad thing is that it seems you can only get back into the map at gates from mechanical doors, which arent existent in important levels. So yea, we can get out of bounds with a cube but we cant get back in the map usefully...

http://imgur.com/eJTfRL6

This is seen from ooB at chapter 3 sector 26..

EDIT: seems useless so yea, lets try to find something usefull above the map

That's the path way that you get warped to if you use the computer in the secret area. Unsure what happens if you manage to get there with a kickflip.

Chapter 7 sector 66 ..... Kickflip to the left could land you ontop of the last level from where you could try to hit the loading zone for the epilogue.. Currently trying to land there

This would skip 5 levels + maybe you can bug into the epilogue !!!

Good luck, I tried for about 2h and then gave up ;) (also, it's incredible how far you go with a kick flip when there's no ceiling to stop you)

Tried for 4 hours and landed in the middle a few times which is a closed area so you would have to land on the borders... Giving up on it now because even if it was possible it would be to hard for a run.. Especially at the end !!