Erratic rope behaviour
From Worms Knowledge Base
In the original release of WormsDC there is a chance that the rope will go crazy and start swinging your worm about at high speeds. Upon releasing your worm, you would either be flung off of the screen or lodged rather impossibly into a chunk of the landscape. It was also occasionally possible to attach your rope to thin air. Both of these glitches are fixed as of v1.05. It may help to use the glitch to knock other worms long distances.