Unity script that allows for animation while Time.timeScale = 0. See http://www.asteroidbase.com/?p=569 for context.

TimeScaleIndependentAnimation.cs

using UnityEngine;
using System.Collections;

public class TimeScaleIndependentAnimation : TimeScaleIndependentUpdate
{
	//inspector fields
	public bool playOnStart;
	public string playOnStartStateName;

	//private fields
	AnimationState currentState;
	System.Action currentCompletionHandler;
	float elapsedTime;
	bool playing;

	void Start()
	{
		if(playOnStart)
		{
			Play(playOnStartStateName);
		}
	}
	
	protected override void Update()
	{
		base.Update();

		if(playing)
		{
			elapsedTime += deltaTime;
			currentState.normalizedTime = elapsedTime / currentState.length;

			if(elapsedTime >= currentState.length)
			{
				playing = false;

				if(currentState.wrapMode == WrapMode.Loop)
				{
					Play(currentState.name);
				}
				else
				{
					if(currentCompletionHandler != null)
					{
						currentCompletionHandler();
					}
				}
			}
		}
	}

	public void Play(string stateName, System.Action completionHandler = null)
	{
		elapsedTime = 0f;
		currentState = animation[stateName];
		currentState.normalizedTime = 0;
		currentState.enabled = true;
		currentState.weight = 1;
		currentCompletionHandler = completionHandler;
		playing = true;
	}
}