So it was this past Saturday; first run of the day. It was still pretty cold, the park had been groomed the night before and was basically set up like concrete. No snow the night before and no frost or ice on the rails or boxes. I go to slide a little flat box just to start warming up. I 90 on and, when I land, it feels like someone sprayed glue on the box. Both of my skis stop dead, I get crushed on the end of the box and my head smacked the ground. I am still feeling the effects of the whiplash I got from it. We checked out a different park at the same mountain a few minutes later and the boxes there were the same way. My guys could actually side step up a box that had a slight down to it.
Point. When I looked at the surface of the HDPE boxes, they looked really dry. I was thinking that cold and dry overnight dries out the top of the HDPE. If I get bored I might try to come up with a spray that park crews could hit the tops of the boxes with to make them slide right on days like this or just as a precaution. Personally I'd like to figure out what conditions cause this, so I know not to try hitting a box again when they are like this.
Anyone ever see boxes get like this? If so, what do you think made them like that?