On Sunday and Monday, New York got like 2 feet of snow. (This picture sorta sucks because you can't really tell how deep the snow is, but trust me, it was a lot).
So there's an ironing board resting on top of a 2 foot pile of snow and in the most obvious set-up ever (I mean, like one not even your slow, eight year old cousin would fall for), David goes to Grant, "Hey, I bet you can't surf on that ironing board." As soon as Grant stands on it, David pushes him into the snow.