diff --git a/iffy.coffee b/iffy.coffee
index 98445a4..d6e98d2 100644
--- a/iffy.coffee
+++ b/iffy.coffee
@@ -386,11 +386,19 @@ class ActorPlayer
 	constructor: (@story) ->
 		@mpnevID_rgnev = {}
 	RespondTo: (nev, nevResponse) ->
+		nevResponse.player_nevIDRespondedTo = nev.ID();
 		rgnev = @mpnevID_rgnev[nev.ID()]
 		if rgnev?
 			rgnev.push(nevResponse)
 		else
 			@mpnevID_rgnev[nev.ID()] = [nevResponse]
+	RemoveResponse: (nevResponse) ->
+		rgnev = @mpnevID_rgnev[nevResponse.player_nevIDRespondedTo]
+		for nev, inev in rgnev
+			if nev.ID() == nevResponse.ID()
+				rgnev.splice(inev, 1)
+				break
+
 	FWillAttempt: (wst, nev) ->
 		rgnev = @mpnevID_rgnev[wst.nev.ID()]
 		if rgnev?
@@ -403,8 +411,14 @@ class ActorPlayer
 		if rgnev? then new EniArray(rgnev) else EniEmpty
 
 	FilterStHtml: (stHtml, wst) ->
-		TemplateFromStNev(stHtml, wst)(wst)
-
+		stHtmlNew = TemplateFromStNev(stHtml, wst)(wst)
+		if (wst.nev.player_nevIDRespondedTo?)
+			stId = wst.gst.RegOnClick(() => @RemoveResponse(wst.nev); wst.gst.Display())
+			stHtmlNew = "<div class='iffy-player-action'>#{stHtmlNew}</div>" +
+						"<div class='iffy-player-ui'><a href='javascript:void(0)' id='#{stId}' class='iffy-undo'>Undo</a></div>"
+		stHtmlNew
+			
+			
 class Story
 	constructor: (@jStory) ->
 		@actorPlayer = new ActorPlayer(this)