Whenever you get caught in a node, you have a couple of options. 1: If the hungry node has already ate up a bunch of the terrain, I find that there are a couple of blocks at the bottom of the gaping hole outside of hungry node reach. I try to jump up (pressing space bar) and when I reach the peak of my jump, I press shift on the way down. That way you're dragged out of the node's reach and land at the bottom of the gaping hole. That's how I got out of my first hungry node. A bit lucky to be sure, but it's better than dying. Just be careful, because you can die from fall damage, although the hungry node's pull helps negate that. Whew. 2: Switch into bat morph and fly the hell out of there. Probably the only other reason besides helping with setting up pipes in small areas that I still use morph. Sure it might be cheaty but it's definitely better than losing all your things and rage quitting a world that you spent a lot of time on. 3: Just have armor that let's you fly like MPS or the Quantum suit. 4: BREAK THE NODE. I once encountered another hungry node and it had just started to eat the terrain so option 1 was not available to me. I started attacking the node like crazy and I managed to break it in time before I died.
These are ways that I found to escape hungry nodes.
Ways to find hungry nodes: 1: You'll be pulled towards it, and anything that's invisible and pulling at you is probably unhealthy wouldn't you say? 2: A gaping strange hole in the ground that looks like the result of a TNT blast. 3: If you have Goggles of Revealing, they look like miniature black holes. 4: If mobs are sucked up and take damage randomly.