Dear Heaven, if I could only do that on a few of my second shots!
Smoked it... and a little luck...
Not enough club.
Provisional Why would you want to hit driver off the tee on your 2nd shot? 
Well,
Pause (old Jack Benny routine)
I really miss seeing my ball roll into a green on a 440 yd parr 5 second shot and I can't hit my driver off the deck too good...yet...
Distance is the second thing to go with aging.
- Edited
I hit a drive on #18 today that went 302 yards. The fact that we had a 20 plus mph wind behind us and it hit the cart path may have had a little to do with it also. Longest drive I've ever had on that hole or any other hole for that matter. Not bad for a 90 mph swing speed.
It was 362 yards and I had 60 yards to the middle of the green. Of course I nutted my 60 degree wedge that flew the green and proceeded to get a bogey 5. 
Sneakylong
They should start playing a soulful violin melody for us when we do this .
Like the one played for calling the monster in "Young Frankenstein".
If so, I'd hear a lot of them .