I made snow for Keystone in Colorado.  It's a tough but fun job.  Make sure you know what you are doing at all times.  You can really get hurt or killed ( I am not trying to scare you)  but just stay alert.  It's a really fun job though.  We rolled sleds all the time, made tons of snow, slid down the huge snow mounds we made on trash can lids.  Just watchout when turning on the water, our water ran something like 900psi.  Thats a lot!  It gets crazy, when you turn the air on you have to hold the gun umtil you turn the water on,...then wow...SNOW!!
Really though, it's a fun job.