I cam across this District 9 minifigure of Wikus by YG-49
and had to chuckle a little.
My snicker is not at the figure itself, which is really quite good, its just seeing Wikus in minifigure form that got me.
The Gauss gun is an amalgam of parts, minifig arms, and a chain blade.
I really like the mutated arm too. Much closer in look and feel to the one in the film than earlier attempts.
Check out other custom minifigures on YG-49's Flickr stream where he continues his love affair with chain blades.
(Picture from YG-49's Flickr stream)