siamese twins and diaspora

This freezing afternoon, I went to a talk by John Akomfrah in ICA. 

He made 14 films since 80's, Handsworth Songs might be the most famous one, which discussed the riot happened 20 years ago. He was born in Ghana, but brought up in south west London. So this probably affected greatly his concept and direction of his works. 

And the most impressed idea that I received today comes from the beginning of his biographical work "Testament". A scene of a/two siamese twins. They are conjointed from belly, so they are facing to each other, weaving their hands babyishly, seems they are having a silent mind conversation. 

This is a clip John borrowed from a hospital, John told us that after, these twins have had an operation. But since something important in their body was singular, so people decided let one alive, another to die.   If they don't separate, both will die....How cruel, the reality. So hard to imagine two brothers, one died for another one's life. I think the living one must have a shadow, a trauma all life long. He must usually think about his dead brother. He must feel unbelievable, regrettable and painful...   for him, and himself.  "The most similar people in the world dead for me at the very beginning." He might think like this everyday.

John said:" I think this is something like diaspora."

Exactly.