Boarding Delta LAX-SYD. Flight is running late. Get to gate after boarding began and navigated via the Zone 3 people hoarding the gate. Hand my ticket to gate agent. "You have received a better seat." I'm skeptical. What could be better than seat 29A? I look down at my new seat. 10B! 10B? 10B!!! It took a few seconds for me to realize that I had been upgraded to Busienss on a 14 hour flight! I did a happy dance and kept saying 'I'm in 10B!' The gate agent told my spouse, who was behind me in line (and also fortunately got an upgrade too!) that 'sir, you need to calm your wife down' as everyone was watching me! The champagne did as I watched many people walk past me to the 'back of the plane.' Best upgrade ever!! But I still woke up with 8 flying hours to go! Lol!