My game Crashed

Put the summary of the bug you're having here

What I expected to happen was...:
My world Loading without a problem.

What actually happened was...:
It said "Minecraft 1.10.2 is not responding." Afterwards it played the map spawn sound and tried to load but then it crashed.

Steps to Reproduce:
1. I load the map Terra Swoop Force.
2. I wait and it says it's not responding.
3. It plays the spawn sound.
4. It Crashes.