Animation with frozen player ??

y game's development is going pretty well recently , but I knew a week can't pass without facing a problem :P . Recently , I thought of an idea that is basically the following : On collision (with whatever) the player won't control the character(which is the first person player) and then an animation would start , after the animation is done the player can control the character again , from the point where he stopped . (so basically character control stops ,player can't move him , till the animation stops)

The problem is , I don't know from where to start . I use C# as my programming language for the game.So if anyone can help , that would be awesome !

Thanks ,