diff --git a/examples/all.janet b/examples/all.janet
index 7143563..67442a8 100644
--- a/examples/all.janet
+++ b/examples/all.janet
@@ -6,3 +6,10 @@
 
 (all truthy? [1 2 3]) # -> true
 (all truthy? [1 2 nil]) # -> false
+
+# multiple data structures can be handled
+(all (fn [x y] (pos? (* x y))) [-1 2] [-2 1]) # -> true
+
+# predicate may not be applied to all values (e.g. 43)
+(all |(neg? (+ $0 $1 $2)) [-2 2] [1 -8] [0 1 43]) # -> true
+