diff --git a/ball.lua b/ball.lua
index c61f596..8eca97a 100644
--- a/ball.lua
+++ b/ball.lua
@@ -363,7 +363,7 @@ minetest.register_node("basic_machines:ball_spawner", {
 		meta:set_float("gravity",0);  -- gravity
 		meta:set_int("puncheable",0); -- if 0 not puncheable, if 1 can be punched by players in protection, if 2 can be punched by anyone
 		meta:set_int("scale",100);
-		meta:set_string("visual","sprite");
+		meta:set_string("visual","sprite"); -- sprite/cube OR particle
 		ball_spawner_update_form(pos);
 		
 	end,
diff --git a/mover.lua b/mover.lua
index b5a4c39..c67fb34 100644
--- a/mover.lua
+++ b/mover.lua
@@ -2394,7 +2394,7 @@ minetest.register_on_player_receive_fields(function(player,formname,fields)
 					meta:set_int("active"..i,active[i]);
 				end
 				if fields.delay then
-					meta:set_float("delay", fields.delay);
+					meta:set_float("delay", tonumber(fields.delay) or 0);
 				end
 			end
 		end