When you say upside down do you mean he used the non face side of the club head, or that he used the club head facing forward but reversed. So the club face was verticle as opposed to horizontal
Yeah, the club face is vertical.....
..set up the club with the heel on top...the angle of the face is favoring
hooking the ball...so you open your stance and move your hands ahead
of the club face....and grip the club much firmer.
With no tee, it is much more difficult 'cause you're hitting every shot on
the toe and it requires an even firmer grip and you still get less distance.
But off the tee you can still hit the sweet spot.