Hello everyone.

Recently I was watching this video on youtube, because it has nice music. However, I couldn't help but wonder exactly what was happening in the video. For some reason these people explode after shaking hands - and I wonder why.

So I was wondering if any Japanese speaking people would be able to translate a bit of it for me?
The part I'm interested in is from the beginning, in up to 1 minute and 27 seconds.

http://uk.youtube.com/watch?v=wrzaEemHHvE

Thanks everybody, and sorry to bother you all.