diff --git a/en_US.ISO8859-1/books/handbook/basics/chapter.sgml b/en_US.ISO8859-1/books/handbook/basics/chapter.sgml
index 7c56f2fceb..8bfbd83eed 100644
--- a/en_US.ISO8859-1/books/handbook/basics/chapter.sgml
+++ b/en_US.ISO8859-1/books/handbook/basics/chapter.sgml
@@ -694,7 +694,10 @@
 	<option>-A</option> option.</para>
         
       <para>All forms take <option>-f</option> to force unmounting,
-	and <option>-v</option> for verbosity.</para>
+        and <option>-v</option> for verbosity.  Be warned that
+        <option>-f</option> is not generally a good idea.  Forcibly
+        unmounting filesystems might crash the computer or damage data
+        on the filesystem.</para>
         
       <para><option>-a</option> and <option>-A</option> are used to
 	unmount all mounted filesystems, possibly modified by the