There is a tongue-twister on this sound: sjuttiosju sjösjuka sjömän sköttes av sju skönsjungande sjuksköterskor i Shanghai.
I think I broke Google Translate's speech playback, trying to see how that would sound.
My head hurts! What does this translate to? 77 'seasick'? 'sailors'? ____ in Shanghai.
Seventy-seven seasick sailors were treated by seven beautifully-singing nurses in Shanghai.
Me practicing theese "sj" sounds. http://38.media.tumblr.com/5c330cef34514d8a2243a8400dfe2c32/tumblr_inline_n0kpgsjMJB1rvpxp5.jpg
Seriously, how is that sound done? I am clueless.