How to I create sudden movements using Unity's animator?

I have been attempting to fix this issue for a few days now with no avail. My issue is this: I am working on a 2D game where I require a piece of the environment to be able to be moved suddenly and without fluid motion. I have tried two different methods of fixing this issue. First, I just tried it normally and played with the samples for the animation. However, that didn't work as it just created one straight fluid animation. Next, I tried creating still key frames of the "sitting" position before it moves. This creates a weird backwards motion before it flies across the screen fluidly.

Example: http://i.imgur.com/WHR4ENC.gif

As you can see, the block moves to the right before quickly moving to the left side. Ideally, the block should appear from its starting position to the left position with no transition in between. How can I do this with my animation?