Apparently, a Dark Vine that limps drags part of itself and moves more slowly than a regular unlimping Dark Vine: Things don't need legs to limp, after all: A damaged airplane can limp back to base.
The REAL funny thing is a limping MONOLITH. How does a monolith limp? It doesn't move, period!
My personal favorite is "lost the head" and its desription "sorry, no helmets any more". Considering that the lost head also means losing both eyes, being feebleminded and mute, that's the Last of my worries.