diff --git a/planetblupi.1.ronn b/planetblupi.1.ronn
index 04e36ed..88f90ed 100644
--- a/planetblupi.1.ronn
+++ b/planetblupi.1.ronn
@@ -187,6 +187,9 @@ Only 10 musics are supported: `music000` to `music009`.
     **Duplicate everything**: this bug is very useful for duplicating objects
     by sending the same order to two Blupis.
 
+    **Take trapped ennemy**: it's possible to take a trapped enemy; it's useless
+    but possible.
+
     **Set fire**: you can add invisible fire on every type of cells (when
     building a map).