I would play 2.Nf3
Next move?
I believe the point of f5 is to place the knight on f6, and push g6 and e6. By pushing f5 first, the Nf6 doesnt block the pawn.
And not being a d4 player, Im not super sure, but I might play like a reversed sicilian, with Nc3 then e4?
Nf3 seems much safer though
L57-1.d4 f5 2.Kd2-Dutch: Apple Pie Attack/Cheese Variation
http://www.chess.com/forum/view/chess-openings/bongcloud-opening-book
Thanks to legend11 and New_User.