Oh yes, it's dangerous, and I rarely use it.  It's funny, I just cd'ed into my ~/version/loom and saw a directory "58" sitting there dated 2008-08-17.  I'll probably keep that one.  Then there's "86.12.before_prune" dated 2009-05-20.  I could "rm -rf" that one pretty safely, since my prompt shows my current directory as "~/version/loom".  Here goes!<p><pre><code>  laptop:~/version/loom$ rm -rf 86.12.before_prune
</code></pre>
FEEL the adrenaline rush!  ;)