diff --git a/lse_service_tunnels.lua b/lse_service_tunnels.lua
--- a/lse_service_tunnels.lua
+++ b/lse_service_tunnels.lua
@@ -417,6 +417,7 @@ service_tunnels_3 = labyrinth {
     enter = function(s)
         lse_sub_2.pdir = "0";
         lse_sub_2.position = "10";
+        lse_sub_2.breath = 12;
     end;
     map = {
         ["00"] = {
@@ -621,6 +622,7 @@ service_tunnels_4 = labyrinth {
     enter = function(s)
         lse_sub_2.pdir = "1";
         lse_sub_2.position = "14";
+        lse_sub_2.breath = 12;
     end;
     map = {
         ["00"] = {
@@ -817,6 +819,7 @@ lse_sub_2 = labyrinth {
     var {
         pdir = "0";
         position = "10";
+        breath = 12;
     };
     nam = "lse_sub_2";
     dir1 = function(s)
@@ -855,6 +858,10 @@ lse_sub_2 = labyrinth {
     enter = function(s)
         service_tunnels_3.position = "35";
         service_tunnels_4.position = "30";
+        s.breath = s.breath - 1;
+        if s.breath <= 0 then
+            walk('game_over_sank');
+        end;
     end;
     map = {
         ["00"] = {