There was a debate about Luke’s severed hand falling to Bespin a while back. I have always assumed it was his hand falling. I tweeted Pablo Hidaglo about it and just realized I actually got a reply-
Pablo Hidalgo @pablohidalgo 5 Jul 2016
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I always figured it to be some unrelated trash. His hand and saber fell earlier and prob wouldn’t end up in the same chute.