diff --git a/Promise.js b/Promise.js
index e9204d3..0506381 100644
--- a/Promise.js
+++ b/Promise.js
@@ -336,6 +336,14 @@ object.Constructor('IterablePromise', Promise, {
 		return list
 			[map](function(elem){
 				//* XXX migrate code from old .__pack(..)...
+				// XXX these are not the same:
+				// 			await Promise.iter(['a', 'b', 'c', [3,2,1], Promise.all([1,2,3])])
+				// 		and:
+				// 			await Promise.iter(['a', 'b', 'c', [3,2,1], Promise.all([1,2,3])], e => e)
+				// 		this produces the correct result:
+				// 			await Promise.iter(['a', 'b', 'c', [3,2,1], Promise.all([1,2,3])], e => [e])
+				// 		this does not flatten the promise:
+				// 			await Promise.iter(['a', 'b', 'c', [3,2,1], Promise.all([1,2,3])]).flat()
 				return elem instanceof IterablePromise ?
 						(elem.isSync() ?
 							handler(elem.sync())