Haha, look what I found on a Swedish site:
http://dojo.fi/~rancid/loituma__.swf
It's a part of some Finnish polka: it repeats forever, but it never gets old!
WARNING: THIS IS ADDICTING!
View it at your own risk!
FYI, this is the source: http://ungdomar.se/forum.php?thread_id=85796