diff --git a/cmd/wait/README.md b/cmd/wait/README.md
index 904f6f9..82ed579 100644
--- a/cmd/wait/README.md
+++ b/cmd/wait/README.md
@@ -22,3 +22,10 @@ Pull a random image available in 30 seconds:
 ```
 docker pull wait.kontain.me/random:30s
 ```
+
+## Demo
+
+This screencast requests an image that should exist in five seconds, then waits
+to see it appear and checks that it's valid.
+
+[![asciicast](https://asciinema.org/a/JUiiq33BaGF3NGx10PP6uvETf.svg)](https://asciinema.org/a/JUiiq33BaGF3NGx10PP6uvETf)