Two days actually come to mind: The first is the first day I landed a backflip. It was 99, and I had just gotten the "new" twintip skis for christmas ('00 yellow 1080s). I went out with my brother and, using a tractor, we built a HUGE gap in a corn field. The jump was like 10 ft high and the gap was like 40 ft, it seemed a very very long ways. I had my dad pull me on the snowmobile and landed it my second try, the adrenaline coursing through my body made me feel invincible and I made my dad pull me the rest of the afternoon until I was too sore to continue. I landed probably 15 backflips, and I never fell on one after the first try.
Second was 2 years ago down in Portillo, Chile. I was studying abroad there and decided to take a trip by myself to this place to ski. Had to sleep in the Santiago airport over night on a bench and then catch a shuttle there. I stayed the shitty hostel with a bunch of british wasters and an argentinian. I awoke the second day after it snowed for 24 hrs straight. Since they only allow 450 people there per week, there are never any lines and the run stayed untracked for 3 days. Me and this argentinian skied from sunup to sun down, face shot 3 foot powder all day, exploring and finding new places to ski, there were no boundaries. Go this place's website and you will be amazed, the most beautiful place I have ever been to. We built a jump and sessioned that for a while, not big but on a hip so still fun. Then we hit the bar and when I woke up the next day, I repeated again.