UFC's Mackenzie Dern: My Hype Train's Gonna Steamroll Amanda Cooper, 'Choo Choo!'
[[tmz:video id=”0_fc2amu7j”]] Mackenzie Dern is clappin’ again at her subsequent opponent for saying she’s gonna “derail her hype practice” … saying Amanda Cooper does not stand an opportunity once they scrap at UFC 224. “That’s good, I hope she tries to try this!”…