No matter what, keep looking up hill for speed demons. At least every few turns. I had a guy coming in hot on my tail as I was laying down some turns and in my side vision I saw someone coming in hot behind me. Thankfully I was wearing sunglasses verses goggles or I would of not had seen him coming with a definite collision. We both said "whoa" as it was a fairly close call. Another reason I will never wear headphones while riding. Can't hear them coming. Hard of hearing as it is anyways. I gave the snowboarder some solid advice in the line. When you see a guy carving be aware he will take up more slope than usual and give them plenty of room.