diff --git a/src/p_local.h b/src/p_local.h
index a010cd37b..0300cffa4 100644
--- a/src/p_local.h
+++ b/src/p_local.h
@@ -133,6 +133,7 @@ extern consvar_t cv_cam_dist[MAXSPLITSCREENPLAYERS], cv_cam_still[MAXSPLITSCREEN
 extern consvar_t cv_cam_speed[MAXSPLITSCREENPLAYERS], cv_cam_rotate[MAXSPLITSCREENPLAYERS];
 
 extern fixed_t t_cam_dist[MAXSPLITSCREENPLAYERS], t_cam_height[MAXSPLITSCREENPLAYERS], t_cam_rotate[MAXSPLITSCREENPLAYERS];
+extern consvar_t cv_inverseslope;
 
 void P_AddPlayerScore(player_t *player, UINT32 amount);
 void P_ResetCamera(player_t *player, camera_t *thiscam);
diff --git a/src/p_user.c b/src/p_user.c
index ef9713808..2dc6b60b7 100644
--- a/src/p_user.c
+++ b/src/p_user.c
@@ -2725,6 +2725,8 @@ consvar_t cv_cam_rotate[MAXSPLITSCREENPLAYERS] = {
 	{"cam4_rotate", "0", CV_CALL|CV_NOINIT, CV_CamRotate, CV_CamRotate4_OnChange, 0, NULL, NULL, 0, 0, NULL}
 };
 
+consvar_t cv_inverseslope = {"inverseslope", "Off", CV_SAVE, CV_OnOff, NULL, 0, NULL, NULL, 0, 0, NULL};
+
 fixed_t t_cam_dist[MAXSPLITSCREENPLAYERS] = {-42,-42,-42,-42};
 fixed_t t_cam_height[MAXSPLITSCREENPLAYERS] = {-42,-42,-42,-42};
 fixed_t t_cam_rotate[MAXSPLITSCREENPLAYERS] = {-42,-42,-42,-42};
@@ -4160,6 +4162,33 @@ static void P_HandleFollower(player_t *player)
 	}
 }
 
+	/* gaysed script from me, based on Golden's sprite slope roll */
+
+static void
+DoABarrelRoll (player_t *player)
+{
+	angle_t slope;
+	angle_t delta;
+
+	if (player->mo->standingslope)
+	{
+		delta = ( player->mo->angle - player->mo->standingslope->xydirection );
+		slope = FixedMul(FINESINE (delta>>ANGLETOFINESHIFT),
+				player->mo->standingslope->zangle);
+		if (cv_inverseslope.value)
+			slope = -slope;
+	}
+	else
+		slope = 0;
+
+	delta = (INT32)( slope - player->viewrollangle )/ 16;
+
+	if (delta)
+		player->viewrollangle += delta;
+	else
+		player->viewrollangle  = slope;
+}
+
 //
 // P_PlayerThink
 //
@@ -4535,6 +4564,8 @@ void P_PlayerThink(player_t *player)
 
 	K_KartPlayerThink(player, cmd); // SRB2kart
 
+	DoABarrelRoll(player);
+
 	LUAh_PlayerThink(player);
 }
 
diff --git a/src/r_main.c b/src/r_main.c
index 4ee99fc45..7f7000588 100644
--- a/src/r_main.c
+++ b/src/r_main.c
@@ -1705,6 +1705,8 @@ void R_RegisterEngineStuff(void)
 		CV_RegisterVar(&cv_cam_rotate[i]);
 	}
 
+	CV_RegisterVar(&cv_inverseslope);
+
 	CV_RegisterVar(&cv_showhud);
 	CV_RegisterVar(&cv_translucenthud);