Well in actuality, all of the songs, Woodfall, Great Bay, Snowhead, and Ikana, are exactly the same (in the game they just feature different samples, woodfall has a 'wood' instrument feel, great bay is bells, ikana is voices, etc). I was just using different samples with different rhythmic beats. Didn't actually mean to transition to ikana, but hey, if you liked it, thats good enough for me =)!

Edit: I think i realized what you meant. That transition into another theme, is really just a transition to the theme of Majora's Mask, the actual mask. Coincidentally, this shares the same theme with the outside zones of GB, SH, WF, and IC. The music guys for this game really weren't going for points on originality lol.