not feeling the slide in

js/bootstrap-modal.js

@@ -59,17 +59,16 @@
       this.isShown = true
 
       _.escape.call(this)
-      _.backdrop.call(this, function () {
+      _.backdrop.call(this)
 
-        that.$element
-          .appendTo(document.body)
-          .show()
+      this.$element
+        .appendTo(document.body)
+        .show()
 
-        setTimeout(function () {
-          that.$element.addClass('in').trigger('modal:shown')
-        }, 1)
-
-      })
+      setTimeout(function () {
+        that.$element.addClass('in').trigger('modal:shown')
+        that.$backdrop && that.$backdrop.addClass('in')
+      }, 1)
 
       return this
     }
@@ -82,12 +81,11 @@
       this.isShown = false
 
       _.escape.call(this)
+      _.backdrop.call(this)
 
       this.$element.removeClass('in')
 
       function removeElement () {
-        _.backdrop.call(that)
-
         that.$element
           .detach()
           .trigger('modal:hidden')
@@ -108,21 +106,13 @@
 
   var _ = {
 
-    backdrop: function ( callback ) {
+    backdrop: function () {
       var that = this
         , animate = this.$element.hasClass('fade') ? 'fade' : ''
       if ( this.isShown && this.settings.backdrop ) {
         this.$backdrop = $('<div class="modal-backdrop ' + animate + '" />')
           .click($.proxy(this.hide, this))
           .appendTo(document.body)
-
-        setTimeout(function () {
-          that.$backdrop && that.$backdrop.addClass('in')
-
-          $.support.transition && that.$backdrop.hasClass('fade')?
-            that.$backdrop.one(transitionEnd, callback) :
-            callback()
-        })
       } else if ( !this.isShown && this.$backdrop ) {
         this.$backdrop.removeClass('in')