Can anyone tell me why this htaccess file would be generating:

RewriteEngine on

RewriteCond %{HTTP_REFERER}!^http://([a-z0-0-9-]+\.)*hisdomain.com*/[NC]

RewriteCond %{HTTP_REFERER} !^http://.+\.mancheck\.com/* [NC]

RewriteRule /*http://%{HTTP_HOST}/[R,L]

error 500: Internal Server Error
The server encountered an unexpected condition which prevented it
from fulfilling the request."

Thanks
Dzinerbear