I dont have the model any more.. If there is a expression it would be either on the root or the foot controls.. it should pop up on your channel box as a little pull down menu.. once you fine the expression change it so it will say take no action...
This tut was done on a eariler vershion of maya as well and might be found in a different location.
I am enough of an artist to draw freely upon my imagination, knowledge is limited, imagination encircles the world. (Albert Einstein)
https://www.artstation.com/kurtb