Look while editing.

A word of advice.

When animating in Maya and get to the stage of editing keys in the hyper graph it would help to help to have a dual view set up so you can see the changes that you will be making.

Otherwise you could be breaking your animation like i have here.

I started working in the hyper graph removing what i thought was unnecessary keys that had no motion to them.

Apparently that was not the case, after i had deleted all the keys i checked the animation and this was the result.

Thought i would have learnt by now to look in the viewport when changing settings.