On your way to the cougars stadium in Act 2, when you fight the lambent in an abandoned supermarket, there is a picture of cole and a button, if you press the button it says: Cole Train runs on Whole Grain baby WOOO! But if you press it enough it says his big speech that he shouth down the mic in the hollow on GoW 2.
There is also a white cap next to the picture that cole can wear either forwards or backwards.