Emulator

Game Name?
Xenoblade Chronicles

Game ID?
SX4E01

What's the problem? Describe what went wrong in few words.
Random crash. Maybe I did too many things at once?

What did you expect to happen instead?
For it to lag to hell but not crash.

What steps will reproduce the problem?

1. Well, I went to the Judicial District in Agniratha and fought a bunch of enemies
2. After using Fiora's Gun Drones II, the FPS count went to 0 with the music and the VPS still going

Dolphin 3.5 and 3.5-367 are old versions of Dolphin that have
known issues and bugs, so don't report issues about them and test the
latest Dolphin version first.
Which versions of Dolphin did you test on?
4.0-6957

Does using an older version of Dolphin solve your issue? If yes, which
versions of Dolphin used to work?
Haven't checked.

What are your PC specifications? (including, but not limited to: Operating
System, CPU and GPU)
Windows 7 x64
Intel i7 4770
nVidia GeForce GTX 760 (GV-N760OC-2GD REV2.0)
8GB G.Skill Sniper Low-Voltage series @ 1600MHz 9-9-9-24

Is there any other relevant information? (e.g. logs, screenshots,
configuration files)

My save file and a save state I created after it happened: http://www.mediafire.com/download/zjuio9u51v4sjou/Xenoblade_Files.zip

I get the feeling it's just a simple "did too much crap at once" crash. But just so that other people don't lose a few hours like I did...