go to your profile then edit
type
<script>alert('
in your 1st name
&
this one is for your last name as in my profile
yourmsg');</script>
i will raise an alert which is totally harmless, but i could be little scary for your friend.
Further, if you add typeracer application at top of your profile i will come twice.
Hurry up lest it should be fixed.
Enjoy
Happy Orkuting