If you get to the place in sand zone with a heck-ton of birds and fall down, there is a single block you can walk through that goes nowhere, does anyone know why this is here?
The sign next to it tells you that some blocks can be passed through I believe, so if you look around you see the one different block and think hmm, what if that's the thing. quote jumps in and passes through. tadaa, now find one with stuff behind.