Two reasons...Soft conditions and End of season:
The soft conditions tend to get people to push themselves a bit more cause well, it's softer, however, it also makes for slower snow and more mush to get caught up in.
The end of season means people don't really care about getting hurt as much anymore cause they've got all summer to heal, plus they want to learn new tricks before the season ends.
So everyone just remember to be safe and have fun...but don't push yourself past your limits.
~WAKIN' UP THE NEIGHBORHOOD TONIGHT!~