diff --git a/controllers/prototype/dbrequests.js b/controllers/prototype/dbrequests.js
index 5fcf474..6333294 100644
--- a/controllers/prototype/dbrequests.js
+++ b/controllers/prototype/dbrequests.js
@@ -855,6 +855,14 @@ DBReq.ExpCreator.prototype.execute = function() {
 DBReq.ExpCreator.prototype.finish = function() {
     var self = this;
 
+    // self.finishAction(
+    //     self.finalResult.expId,
+    //     self.finalResult.coinCombinationId,
+    //     self.finalResult.sceneId,
+    //     self.finalResult.recommendationStyle,
+    //     self.finalResult.coins
+    // );
+
     // Commit, and then release
     this.client.query("COMMIT;", function() {
 
@@ -1046,10 +1054,12 @@ DBReq.LastExpGetter.prototype.execute = function() {
         'FROM Experiment, CoinCombination \n' +
         'WHERE Experiment.coin_combination_id = CoinCombination.id \n' +
         '      AND Experiment.user_id = $1 \n' +
+        '      AND NOT Experiment.finished \n' +
         'ORDER BY Experiment.id DESC \n' +
         'LIMIT 1;',
         [self.userId],
         function (err, result) {
+
             if (err !== null) {
                 Log.dberror(err + ' in LastExpGetter (DBReq)');
             }
@@ -1059,21 +1069,29 @@ DBReq.LastExpGetter.prototype.execute = function() {
                 }, 1000);
                 return;
             }
-            self.finalResult.sceneId = result.rows[0].sceneId;
-            self.finalResult.recommendationStyle = result.rows[0].recommendationStyle;
-            self.finalResult.coins = [
-                result.rows[0].coin_1,
-                result.rows[0].coin_2,
-                result.rows[0].coin_3,
-                result.rows[0].coin_4,
-                result.rows[0].coin_5,
-                result.rows[0].coin_6,
-                result.rows[0].coin_7,
-                result.rows[0].coin_8
-            ];
-            self.finalResult.coinCombinationId = result.rows[0].coinCombinationId;
-            self.finalResult.expId = result.rows[0].expId;
-            self.finish();
+
+            self.client.query(
+                'UPDATE Experiment SET finished = true WHERE id = $1',
+                [result.rows[0].expId],
+                function() {
+                    self.finalResult.sceneId = result.rows[0].sceneId;
+                    self.finalResult.recommendationStyle = result.rows[0].recommendationStyle;
+                    self.finalResult.coins = [
+                        result.rows[0].coin_1,
+                        result.rows[0].coin_2,
+                        result.rows[0].coin_3,
+                        result.rows[0].coin_4,
+                        result.rows[0].coin_5,
+                        result.rows[0].coin_6,
+                        result.rows[0].coin_7,
+                        result.rows[0].coin_8
+                    ];
+                    self.finalResult.coinCombinationId = result.rows[0].coinCombinationId;
+                    self.finalResult.expId = result.rows[0].expId;
+                    self.finish();
+
+                }
+            );
         }
     );
 };
@@ -1192,8 +1210,8 @@ DBReq.TutorialCreator.prototype.execute = function() {
                 function(err, result) {
                     // Create experiment
                     self.client.query(
-                        "INSERT INTO Experiment(user_id, coin_combination_id)\n" +
-                        "VALUES($1,$2)\n" +
+                        "INSERT INTO Experiment(user_id, coin_combination_id, finished)\n" +
+                        "VALUES($1,$2, true)\n" +
                         "RETURNING id;",
                         [self.id, result.rows[0].id],
                         function(err, result) {
diff --git a/controllers/prototype/index.js b/controllers/prototype/index.js
index 582e179..63730ee 100644
--- a/controllers/prototype/index.js
+++ b/controllers/prototype/index.js
@@ -81,10 +81,26 @@ module.exports.play = function(req, res) {
 
     db.getLastExp(req.session.userId, function(expId, sceneId, coinId, recoStyle, coins) {
 
+        // if (coinId === undefined) {
+        //     console.log("=== ERROR : COIN_ID IS UNDEFINED ===");
+        //     process.exit(-1)
+        // }
+
         res.locals.scene = sceneToFunction(sceneId);
         res.locals.recommendationStyle = recoStyle;
         res.locals.coins = coins;
 
+        // var elt = req.session.experiments.find(function(elt) {
+        //     return elt.coinCombinationId === coinId;
+        // });
+
+        // if (elt !== undefined) {
+        //     console.log("=== ERROR DETECTED === user " + req.session.userId);
+        //     console.log(req.session.experiments);
+        //     console.log(coinId);
+        //     process.exit(-1)
+        // }
+
         req.session.experiments.push({
             sceneId: sceneId,
             recommendationStyle: recoStyle,
diff --git a/sql/backup.pgsql b/sql/backup.pgsql
index 3265e9f..aac4541 100644
--- a/sql/backup.pgsql
+++ b/sql/backup.pgsql
@@ -73,7 +73,8 @@ CREATE TABLE Experiment(
     id SERIAL PRIMARY KEY,
     user_id SERIAL REFERENCES Users (id),
     coin_combination_id SERIAL REFERENCES CoinCombination (id),
-    recommendation_style VARCHAR(30)
+    recommendation_style VARCHAR(30),
+    finished BOOLEAN DEFAULT(false)
 );
 
 -- Init scene table
diff --git a/utils/load/load.js b/utils/load/load.js
index 511d882..fcb65da 100644
--- a/utils/load/load.js
+++ b/utils/load/load.js
@@ -1,5 +1,5 @@
 var baseUrl = 'http://localhost:4000/';
-var baseUrl = 'http://3dinterface.no-ip.org/';
+// var baseUrl = 'http://3dinterface.no-ip.org/';
 
 function makeId()
 {