Thanks for the pics! We were lucky enough to have far more snow, so it's tough to identify the terrain for sure ... But I do believe the "S-Chute" is the one I skied off Roca Jack, from what I can tell. In your pick of the Gargantita chutes, I did the one to the left (looking up the mountain). It was skiable all the way down without having to worry about hitting/jumping rocks.
I'm not sure that I managed to have quite as much fun as your friend Shane
I've never drank in the middle of a ski day. Too scary for me not to think I'm in complete control.