Weird Nautilus tweak

Nautilus' left foot does a weird twitch, but only when his movement speed gets to around 450. I think this happens with all of his skins except his AstroNautilus skin (tested Warden, Classic, and Astro) I went with movement speed in my masteries and Boots of Mobility to reach around 450 where his foot tweaks out.

I recorded a quick little clip