You can cut the concrete, too, for that matter, with oxyacetylene, as long as you wear certain protective gear. We have a few vault covers here that are concrete covering the largest vaults we have. You need more than a manhole hook to get one of those covers up.

And when you think you have it safely burried someone drives a tunnel boring machine through it - http://www.flickr.com/photos/23919135@N00/3426407496/ brandon