Building Terrain (freeze)

I was playing on my friends realm he created and i was setting up my mob spawner grinder, and then i went through my grinder, and i fell to my death. Once on the death screen, it would not let me respawn, and so i closed minecraft. When i try to go back intop the realm now it gets stuck at the building terrain screen, and absolutely never loads the world. and so i cant play on the realm.