From where did you climb up? I thought I manage to seal off any ways to get out of the level bounds, spent quite some time with it too
Owell...
I did the exact same thing.
I really thought it was the way to do it. but no?
This was done in Challenge 2. I have a better quality video I will link. I also found a way to get out of Challenge 3 as well. Linking a video of that as well. The only one I couldn't manage to get out of was Challenge 1 since there is some kind of invisible roof stopping me. I would have been able to if it wasn't for that heh.
Challenge 2:
http://www.youtube.com/watch?v=l-NGJO6Axac
Challenge 3:
http://www.youtube.com/watch?v=ctpA3Taj5Z4
Yeah, I managed to find a way outside Challenge 1 but it was way to hard to film. I only did it maybe 3 times out of 60-70 attempts. I can describe how and maybe get some screen shots if you like lol.