Tight finish: Viewed, ridden by Blake Shinn, manages to repel the late challenge of jockey Corey Brown and Bauer to win the Melbourne Cup at Flemington today
He said: "It's nice to win a race like this at my age. I'm not really emotional, it's just another win.
"What a great day it's been. I do make a habit of winning this race and someone once told me it's a good habit to get into.
"It's also great to see the Aussies succeed."
O'Brien's three runners Septimus, Alessandro Volta and Honolulu effectively became pacemakers for the whole field as they set a strong gallop in the early stages and at one point were a ridiculous six lengths clear with Colm O'Donoghue rowing away furiously on Honolulu.
They were never likely to keep up the pace and the trio of jockeys were later asked to explain their rides to local stewards.
Shinn produced Viewed to take the lead just over two furlongs out and the five-year-old quickly opened up a gap on the rest of the field that only Bauer was able to bridge.
John Sadler's C'est La Guerre stayed on for third ahead of Master O'Reilly with Irish trainer Dermot Weld's Profound Beauty feeling the ground but running a great race to be fifth.
Shinn, the leading rider in Sydney after teaming up with Gai Waterhouse, was emotional at winning the big race. He said: "I'm gonna cry but I want to say thank you to Viewed.
"I got there way too early but he was travelling that strongly. When I pushed the button he had a very good turn of foot. To win a Melbourne Cup at only 21, I'm delighted and hopefully the best is yet to come from me."
Shinn was not the only one shedding tears as Bauer was a second Melbourne Cup runner-up for Brown who said: "I feel like crying."