Events.onStepTakenFieldMovement+=proc{|sender,e|
  event=e[0] # Get the event affected by field movement
  currentTag=pbGetTerrainTag(event)
  if pbGetTerrainTag(event,true)==PBTerrain::Grass  # Won't show if under bridge
    $scene.spriteset.addUserAnimation(GRASS_ANIMATION_ID,event.x,event.y,true)
  elsif event==$game_player && currentTag==PBTerrain::WaterfallCrest
    # Descend waterfall, but only if this event is the player
    Kernel.pbDescendWaterfall(event)
  elsif event==$game_player && currentTag==PBTerrain::Ice && !$PokemonGlobal.sliding
    Kernel.pbSlideOnIce(event)
  end
}