One of my new neighbors is a "Pentecostal Catholic" from India. I have heard of this denomination before, during an Evangelical Missiological Society conference, but didn't have a reason to investigate further until now.
What is a "Pentecostal Catholic"?
I'm familiar with Catholicism and Pentecostalism, so feel free to explain it in terms of the main differences between one (or both) of those denominations if that makes it simpler.
NOTE: I am not looking for an exhaustive explanation of all of their doctrines, just a "what you need to know" sort of thing; i.e. What do they emphasize? What's the back-story?