minetest.register_craftitem("parachute:parachute_item", {
    inventory_image = "default_brick.png",
    on_use = function(itemstack, user, pointed_thing)
        local pos = user:getpos()
        local on = minetest.get_node({x = pos.x, y = pos.y - 1, z = pos.z})
        if on.name == "air" then
            pos.y = pos.y + 3
            local ent = minetest.add_entity(pos, "parachute:parachute")
            user:set_attach(ent, "", {x=0,y=0,z=0}, {x=0,y=0,z=0})
            ent.object:setvelocity({x = 0, y = user:getvelocity().y, z = 0})
            ent = ent:get_luaentity()
            ent.attached = user:get_player_name()
        else
            minetest.chat_send_player(user:get_player_name(), "Cannot open parachute on ground!")
        end
    end
})