Eldar players know what I'm talking about: Warp Spiders have feet that curl up at the end. You gotta actually use the end of a paintbrush or the handle of a pair of side clippers to push them down. If you don't, it looks like they have excited toes that point up to heaven. It reminds me of Mad Magazine cartoonist Don Martin's work; he'd do these pictures of people whose toes would jut up in the air like magnets pointing due north.
The reason I mention this is because the new Striking Scorpions from Games Workshop? I'm working on a bunch tonight. They have Warp Spider Foot.