diff --git a/spec-docs/dynamic-types.md b/spec-docs/dynamic-types.md
index 601a011..b6ae05a 100644
--- a/spec-docs/dynamic-types.md
+++ b/spec-docs/dynamic-types.md
@@ -5,3 +5,43 @@
 Interoperability with native JavaScript
 
 ## Examples
+
+Unbounded dynamic type:
+``` kotlin
+fun jsFun(p: dynamic): dynamic
+```
+
+or
+
+All types are dynamic by default
+``` kotlin
+dynamic fun jsFun(p, r = foo(), typed: Type /*this one is not dynamic*/) { }
+```
+
+Bounded dynamic type:
+``` kotlin
+fun foo(p: dynamic A): dynamic B
+```
+
+## TODO
+
+- [ ] Dynamic functions?
+  - [ ] what is the default return type? 
+  - [ ] Can we omit `return` expressions when the return type is `dynamic`?
+  - [ ] Can we return `Unit` when return type is `dynamic`?
+- [ ] Dynamic classes/traits?
+  - [ ] All members are implicitly `dynamic`
+  - [ ] All types whose type constructors are marked `dynamic` are themselves dynamic types
+
+## Typing rules
+
+- `dynamic` is assignable to anything
+- everything is assignable to `dynamic`
+- `dynamic T` is assignable to `T`
+- subtypes of `T` are assignable to `dynamic T`
+- `dynamic` is the same as `dynamic Any?`
+
+??? When receiver/argument is of type `R := dynamic T`
+- if a call is resolved with `T` instead of `R`, it is a static call, no dynamicity involved
+- 
+