Darth Vader takes matters into his own hands... after apparently forgetting about Luke being his son and such.
Skip to about 1:15 or so in to the video if you want to get to where things start to really diverge from the film. For everyone else, consider it a dramatic tension buildup. Or, something.
Edit 1/2/2016: rewatching this, it seems I forgot to fully balance out the audio from different segments in this edit, apologies to any headphone listeners who had the volume up.
![](https://i.ytimg.com/vi/bm2wePqsxZI/mqdefault.jpg)