Replying to Pow Days inspire bravery in gapers. Why?

Today we had a pretty epic surprise pow day on Big mountain. I had a really fun day, but the carnage was off the charts today across the mountain. I saw five or six carts going down today. I maybe saw that many all year before today! There is also this very clearly expert area called the hellroaring basin. It doesn't open up until around 11-12 as ski patrol has to go through for avvy control. Anyways I was smoking my daily j at a smoke spot at the top of the basin and I just heard this bloodcurdling scream. There's a blue run that all tree runs funnel into in the basin, and this kid broke his leg somehow on that run. What is it about pow days that inspire such bravery in gapers? You'd think they would be immediately deterred seeing that pow takes some experience to ski in.