diff --git a/README.md b/README.md
index 4bfa7ac1..adb4ea5c 100644
--- a/README.md
+++ b/README.md
@@ -249,6 +249,15 @@ afterInfinityModel(posts) {
 }
 ```
 
+afterInfinityModel should return either a promise, ArrayProxy, or a
+falsy value.  The returned value, when not falsy, will take the place of the
+resolved promise object and, if it is a promise, will hold execution until resolved.
+In the case of a falsy value, the original promise result is used.
+
+So relating this to the examples above... In the first example, afterInfinityModel
+does not have an explicit return defined so the original posts promise result is used.
+In the second example, the returned collection of authors is used.
+
 ### Event Hooks
 
 The route mixin also provides following event hooks: