diff --git a/api.lua b/api.lua
index e606d5e..f63f9d7 100644
--- a/api.lua
+++ b/api.lua
@@ -3,7 +3,7 @@
 
 mobs = {}
 mobs.mod = "redo"
-mobs.version = "20180523"
+mobs.version = "20180530"
 
 
 -- Intllib
@@ -289,13 +289,12 @@ end
 -- are we flying in what we are suppose to? (taikedz)
 local flight_check = function(self, pos_w)
 
-	local nod = self.standing_in
-	local def = minetest.registered_nodes[nod]
+	local def = minetest.registered_nodes[self.standing_in]
 
 	if not def then return false end -- nil check
 
 	if type(self.fly_in) == "string"
-	and nod == self.fly_in then
+	and self.standing_in == self.fly_in then
 
 		return true
 
@@ -303,7 +302,7 @@ local flight_check = function(self, pos_w)
 
 		for _,fly_in in pairs(self.fly_in) do
 
-			if nod == fly_in then
+			if self.standing_in == fly_in then
 
 				return true
 			end
@@ -626,7 +625,7 @@ local do_env_damage = function(self)
 
 		if check_for_death(self, "light", {type = "light"}) then return end
 	end
-
+--[[
 	local y_level = self.collisionbox[2]
 
 	if self.child then
@@ -637,7 +636,7 @@ local do_env_damage = function(self)
 	pos.y = pos.y + y_level + 0.25 -- foot level
 	self.standing_in = node_ok(pos, "air").name
 --	print ("standing in " .. self.standing_in)
-
+]]
 	-- don't fall when on ignore, just stand still
 	if self.standing_in == "ignore" then
 		self.object:setvelocity({x = 0, y = 0, z = 0})
@@ -2289,13 +2288,13 @@ local falling = function(self, pos)
 	end
 
 	-- in water then float up
-	if minetest.registered_nodes[node_ok(pos).name].groups.water then
+	if minetest.registered_nodes[self.standing_in].groups.water then
 
 		if self.floats == 1 then
 
 			self.object:setacceleration({
 				x = 0,
-				y = -self.fall_speed / (max(1, v.y) ^ 2),
+				y = -self.fall_speed / (max(1, v.y) ^ 8), -- 8 was 2
 				z = 0
 			})
 		end
@@ -2395,6 +2394,10 @@ local mob_punch = function(self, hitter, tflp, tool_capabilities, dir)
 
 			damage = self.immune_to[n][2] or 0
 			break
+
+		-- if "all" then no tool does damage unless it's specified in list
+		elseif self.immune_to[n][1] == "all" then
+			damage = self.immune_to[n][2] or 0
 		end
 	end
 
@@ -2751,7 +2754,7 @@ local mob_activate = function(self, staticdata, def, dtime)
 	self.collisionbox = colbox
 	self.selectionbox = selbox
 	self.visual_size = vis_size
-	self.standing_in = ""
+	self.standing_in = "air"
 
 	-- check existing nametag
 	if not self.nametag then
@@ -2828,6 +2831,26 @@ local mob_step = function(self, dtime)
 		end
 	end
 
+	-- get node at foot level every quarter second
+	self.node_timer = (self.node_timer or 0) + dtime
+
+	if self.node_timer > 0.25 then
+
+		self.node_timer = 0
+
+		local y_level = self.collisionbox[2]
+
+		if self.child then
+			y_level = self.collisionbox[2] * 0.5
+		end
+
+		-- what is mob standing in?
+		self.standing_in = node_ok({
+			x = pos.x, y = pos.y + y_level + 0.25, z = pos.z}, "air").name
+--		print ("standing in " .. self.standing_in)
+	end
+
+	-- check if falling, flying, floating
 	falling(self, pos)
 
 	-- smooth rotation by ThomasMonroe314
diff --git a/api.txt b/api.txt
index 324ae90..40dbf51 100644
--- a/api.txt
+++ b/api.txt
@@ -126,6 +126,7 @@ functions needed for the mob to work properly which contains the following:
       {"default:sword_wood",  0} -- causes no damage.
       {"default:gold_lump", -10} -- heals by 10 health points.
       {"default:coal_block", 20} -- 20 damage when hit on head with coal blocks.
+      {"all"} -- stops all weapons causing damage apart from those on list.
 
    'makes_footstep_sound' when true you can hear mobs walking.
    'sounds'               this is a table with sounds of the mob
diff --git a/crafts.lua b/crafts.lua
index 1e98f64..0bf42ad 100644
--- a/crafts.lua
+++ b/crafts.lua
@@ -176,3 +176,9 @@ minetest.register_craft({
 	recipe = "mobs:saddle",
 	burntime = 7,
 })
+
+minetest.register_craft({
+	type = "fuel",
+	recipe = "mobs:fence_wood",
+	burntime = 7,
+})
diff --git a/lucky_block.lua b/lucky_block.lua
index 7da0040..8cf20ed 100644
--- a/lucky_block.lua
+++ b/lucky_block.lua
@@ -6,10 +6,12 @@ if minetest.get_modpath("lucky_block") then
 		{"dro", {"mobs:meat"}, 5},
 		{"dro", {"mobs:nametag"}, 1},
 		{"dro", {"mobs:leather"}, 5},
+		{"dro", {"default:stick"}, 10},
 		{"dro", {"mobs:net"}, 1},
 		{"dro", {"mobs:lasso"}, 1},
 		{"dro", {"mobs:shears"}, 1},
 		{"dro", {"mobs:protector"}, 1},
+		{"dro", {"mobs:fence_wood"}, 10},
 		{"lig"},
 	})
 end
diff --git a/readme.MD b/readme.MD
index 68b03e7..b555b34 100644
--- a/readme.MD
+++ b/readme.MD
@@ -22,6 +22,7 @@ Lucky Blocks: 9
 
 
 Changelog:
+- 1.42- Added "all" option to immune_to table, tidied floating mobs to be less intensive
 - 1.41- Mob pathfinding has been updated thanks to Elkien3
 - 1.40- Updated to use newer functions, requires Minetest 0.4.16+ to work.
 - 1.39- Added 'on_breed', 'on_grown' and 'do_punch' custom functions per mob