There have been countless times in the past that spectacular, bone-jarring tackles have won matches. When such moments occur at the right time, they can lift a team to hang in there for a vital few more minutes or, if you look at it from the other perspective, big tackles can demoralize the opposition completely.
Even more demoralizing however, is when a big tackle is followed by another big tackle, and then another, and then another. When going backwards while on attack your options quickly narrow down to kicking the ball away.
Thankfully for the Australians, the kick is a good one, but nothing can take away from a truly tenacious All Black defensive display, as seen here in the Bledisloe Cup a couple of seasons back.