I just cant seem to get the Iwasawa Tower laceration, I can not see what he is doing in the video or what string to hit, any help would be apreciated! 
http://www.youtube.com/watch?v=oyI5X-H0MOM
watch the last part of the video
it’s a very very clear and good instruction,
i downloaded it and watched for abt 30 times, and took 3 days practise and now i got it ^ ^
hint:
try to form the tower with your hands first,after you get the concept,try to do it without a laceration. then at last,do it with a laceration
i suggest learning 1.5 hook before learning this trick if you havent
good luck and good yoyoing ^ ^
if you want,you can add my msn : eugenebw1995@hotmail.com
Well I agree to Eugene, But as what Ryosuke said to me, it’s a sort of a mix up 1.5 and wrist whip.
and to dismount it, see that left leg of the tower? It’s a GT, then … =p