After Wallabies fullback Israel Folau made a brilliant break with some fancy footwork, the ball was spread back infield with plenty of space out wide.
It wasn't the best pass, but it was Australia's best opportunity to score the game's opening try.
And Mumm made a mare of it.
@AussieVideos pic.twitter.com/IOmcN7gdY2
— Brendan Bradford (@1bbradfo) August 8, 2015