diff --git a/src/post2html b/src/post2html
index 8fd821f..eeafa77 100755
--- a/src/post2html
+++ b/src/post2html
@@ -109,6 +109,15 @@ prefmt()
       next
     }
 
+    # reference to the content of the last fence (e.g. if a previous
+    # code block is HTML and we want to render it as an example)
+    /^```/ {
+      gather = !gather
+      if ( gather ) gblock = ""
+    }
+    !/^```/ && gather { gblock = gblock $0 "\n" }
+    !gather && /^ *@LASTFENCE@$/ { print gblock; next }
+
     { print }
   '
 }