diff --git a/paper/fig2.ipynb b/paper/fig2.ipynb
index d387d32..25892c3 100644
--- a/paper/fig2.ipynb
+++ b/paper/fig2.ipynb
@@ -168,6 +168,8 @@
     "                                    width=params.panels.raster[0], \n",
     "                                    height=params.panels.velocity[1])\n",
     "\n",
+    "# the `gs` object has a `.fig` attribute, so having a `fig` argument in the function signature is a bad practice\n",
+    "\n",
     "axes2_1 = rt.plot_fr_raster(raster_example_df[0], gs2_1, fig, range(monkey_defs.n_targets))\n",
     "axes2_2 = rt.plot_fr_raster(raster_example_df[1], gs2_2, fig, range(monkey_defs.n_targets))\n",
     "utility.phantom_axes(fig.add_subplot(gs2_1[:])).set_title('Monkey $C_L$', pad=8)\n",