So, in an interview, Eddie said that Colin's wand technique in the final battle was like 'Fifty Shades of Gray meets the wizarding world'. And I think we all agree that his wand technique was pretty intense. And awesome.

Do what you will with that information/lead in. Whatever you want, just no Grindel!Graves. I'm incredibly amused by Eddie's choice of phrasing on how Colin got 'wand elbow'.