Run, run... not you, The Wall! The Wall supports inertia in drag release. You may move your wall and see it run until it stops. Set inertia=true and your wall will be free to move. Have you enabled the automatic positioning? No problem.

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CONFIGURATION

Configuration The Wall

                // Define The Wall
                var maxLength    = 100; // Max Number images
                var counterFluid = 1;
                var wallFluid = new Wall("wall", {
                                "draggable":true,
                                "inertia":true,
                                "width":150,
                                "height":150,
                                "rangex":[-100,100],
                                "rangey":[0,1],
                                callOnUpdate: function(items){
                                    items.each(function(e, i){
                                        var a = new Element("img[src=/your/folder/images/"+counterFluid+".jpg]");
                                            a.inject(e.node).fade("hide").fade("in");
                                        counterFluid++;
                                        // Reset counter
                                        if( counterFluid > maxLength ) counterFluid = 1;
                                    })
                                }
                            });
                // Init Fluid Wall
                wallFluid.initWall();