gistfile.patch

diff --git a/lib/http.js b/lib/http.js
index 339a889..5a9abf2 100644
--- a/lib/http.js
+++ b/lib/http.js
@@ -512,6 +512,9 @@ OutgoingMessage.prototype._writeRaw = function(data, encod
     return true;
   }

+  if (this.connection && this.connection._httpMessage !== this)
+    throw new Error('wtf?');
+
   if (this.connection &&
       this.connection._httpMessage === this &&
       this.connection.writable &&