diff --git a/README.md b/README.md
index 47473dc..ec4b926 100644
--- a/README.md
+++ b/README.md
@@ -55,6 +55,11 @@ which seems to have broken it in Earthworm Jim (and Mortal Kombat 1).
 
 ![alt text](images/sega-genesis-earthworm-jim.png)
 
+The following gif was only recorded at 15 frames a second instead of the full
+60, so it appears jerky and some animations seem to freeze in the gif, even
+though that doesn't happen during normal play
+
+![alt text](images/sega-genesis-sonic2-demo.gif)
 
 Computie
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diff --git a/images/sega-genesis-sonic2-demo.gif b/images/sega-genesis-sonic2-demo.gif
new file mode 100644
index 0000000..20c5ebf
Binary files /dev/null and b/images/sega-genesis-sonic2-demo.gif differ