VM instances can execute a single command now (VM#execute!(foo)) and added "stop" action to force immediate shutdown of VM.

lib/vagrant/actions/stop.rb

@@ -0,0 +1,10 @@
+module Vagrant
+  module Actions
+    class Stop < Base
+      def execute!
+        logger.info "Forcing shutdown of VM..."
+        @vm.vm.stop(true)
+      end
+    end
+  end
+end

lib/vagrant/vm.rb

@@ -88,7 +88,12 @@ error
       @actions << action_klass.new(self, *args)
     end
 
-    def execute!
+    def execute!(single_action=nil, *args)
+      if single_action
+        @actions.clear
+        add_action(single_action, *args)
+      end
+
       # Call the prepare method on each once its
       # initialized, then call the execute! method
       [:prepare, :execute!].each do |method|
@@ -118,10 +123,7 @@ error
     end
 
     def destroy
-      if @vm.running?
-        logger.info "VM is running. Forcing immediate shutdown..."
-        @vm.stop(true)
-      end
+      execute!(Actions::Stop) if @vm.running?
 
       logger.info "Destroying VM and associated drives..."
       @vm.destroy(:destroy_image => true)

test/vagrant/actions/stop_test.rb

@@ -0,0 +1,12 @@
+require File.join(File.dirname(__FILE__), '..', '..', 'test_helper')
+
+class StopActionTest < Test::Unit::TestCase
+  setup do
+    @mock_vm, @vm, @action = mock_action(Vagrant::Actions::Stop)
+  end
+
+  should "force the VM to stop" do
+    @vm.expects(:stop).with(true).once
+    @action.execute!
+  end
+end

test/vagrant/vm_test.rb

@@ -92,6 +92,21 @@ class VMTest < Test::Unit::TestCase
       @vm.add_action(action_klass, "foo", "bar")
     end
 
+    should "clear the actions and run a single action if given to execute!" do
+      action = mock("action")
+      run_action = mock("action_run")
+      run_class = mock("run_class")
+      run_class.expects(:new).once.returns(run_action)
+      @vm.actions << action
+
+      [:prepare, :execute!].each do |method|
+        action.expects(method).never
+        run_action.expects(method).once
+      end
+
+      @vm.execute!(run_class)
+    end
+
     should "run #prepare on all actions, then #execute!" do
       action_seq = sequence("action_seq")
       actions = []
@@ -154,6 +169,7 @@ class VMTest < Test::Unit::TestCase
     context "destroying" do
       setup do
         @mock_vm.stubs(:running?).returns(false)
+        @vm.stubs(:execute!)
       end
 
       should "destoy the VM along with images" do
@@ -163,8 +179,8 @@ class VMTest < Test::Unit::TestCase
 
       should "stop the VM if its running" do
         @mock_vm.expects(:running?).returns(true)
-        @mock_vm.expects(:stop).with(true)
         @mock_vm.expects(:destroy).with(:destroy_image => true).once
+        @vm.expects(:execute!).with(Vagrant::Actions::Stop).once
         @vm.destroy
       end
     end