diff --git a/notebooks/test-collision.ipynb b/notebooks/test-collision.ipynb
index 22b2ae88d2ff5182307861e085e64d9396ca261e..422e1934288085399574a05636b364f6e0aaaf07 100644
--- a/notebooks/test-collision.ipynb
+++ b/notebooks/test-collision.ipynb
@@ -1,10 +1,31 @@
 {
  "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Test Collisions\n",
+    "A visual test of a \"rear-shunt\" collision, to ensure that the agent does not get marked as collided permananently."
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 1,
    "metadata": {},
-   "outputs": [],
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<style>.container { width:95% !important; }</style>"
+      ],
+      "text/plain": [
+       "<IPython.core.display.HTML object>"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
    "source": [
     "%load_ext autoreload\n",
     "%autoreload 2\n",
@@ -38,12 +59,13 @@
     "from flatland.envs.rail_env import RailEnv, RailEnvActions\n",
     "from flatland.envs.persistence import RailEnvPersister\n",
     "from flatland.utils.rendertools import RenderTool\n",
-    "from flatland.utils import env_edit_utils as eeu"
+    "from flatland.utils import env_edit_utils as eeu\n",
+    "from flatland.utils import jupyter_utils as ju"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 4,
    "metadata": {},
    "outputs": [
     {
@@ -56,7 +78,7 @@
     {
      "data": {
       "application/vnd.jupyter.widget-view+json": {
-       "model_id": "eee80deb8b17429d88bd0913cb55790f",
+       "model_id": "05c64c7cfb3e4dba9057c0d0787223d9",
        "version_major": 2,
        "version_minor": 0
       },
@@ -78,15 +100,9 @@
     "oCan = canvas.Canvas(size=(600,300))\n",
     "oCan.put_image_data(oRT.get_image())\n",
     "print(f\"UCF: {bUCF}\")\n",
-    "oCan\n"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
+    "display.display(oCan)\n",
+    "\n",
+    "\n",
     "iPauseStep=10\n",
     "iPauseLen = 5\n",
     "\n",
@@ -113,25 +129,67 @@
     "    with open(f\"tmp-images/img-{iStep:03d}.png\", \"wb\") as fImg:\n",
     "        pilImg.save(fImg)\n",
     "    \n",
-    "    time.sleep(0.5)"
+    "    time.sleep(0.05)"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 5,
    "metadata": {},
    "outputs": [],
    "source": [
     "#!ffmpeg -i ./tmp-images/img-%03d.png -vcodec mpeg4 -filter:v \"setpts=8.0*PTS\" -y movie_nucf_stop.mp4"
    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "oEC = ju.EnvCanvas(env)\n",
+    "env.reset(regenerate_rail=False)\n",
+    "oEC.oRT.render_env()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "application/vnd.jupyter.widget-view+json": {
+       "model_id": "a485406ea061479db50fb90c43833bc2",
+       "version_major": 2,
+       "version_minor": 0
+      },
+      "text/plain": [
+       "Canvas(layout=Layout(height='300px', width='600px'), size=(600, 300))"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
+   "source": [
+    "oEC.show()"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
   }
  ],
  "metadata": {
   "hide_input": false,
   "kernelspec": {
-   "display_name": "ve367",
+   "display_name": "Python 3",
    "language": "python",
-   "name": "ve367"
+   "name": "python3"
   },
   "language_info": {
    "codemirror_mode": {