MVC controller accessing NHibernate SessionFactory from static variable

HomeController.cs

public class HomeController : Controller
{
	public ActionResult Index()
	{
		//Get static SessionFactory defined in Global.asax
		var session = MvcApplication.SessionFactory.GetCurrentSession();

		using (ITransaction transaction = session.BeginTransaction())
		{
			var word = new Word
			{
				Text = "Abracadabra"
			};

			session.Save(word);
			transaction.Commit();
			ViewBag.Message = "Word saved: " + word.Text;
		}

		return View();
	}
}