Double-overtime thrillers, rivalry beatdowns, and a hierarchy fast taking shape - Week 4 of Mountain West football delivered all the chaos and clarity college football fans crave. As New Mexico solidifies its quarterback situation and Air Force pulls off a gutsy high-wire act, the conference title race is heating up. Meanwhile, bounce-back performances and early-season shocks are completely shifting the tier list. Here are the top five takeaways from a wild weekend of Mountain West action.