If you remember the periodic table from "What is the chemical for metal?" then you might recall that carbon is a non-metal. But, scientsts are finding that they can get carbon to behave like a metal in certain highly specialized situations!
One of the properties of a metal is its ability to undergo metallic bonding, where all of the metal atoms "share" their electrons so that the electrons can flow freely. With non-metals, electrons cannot move beyond their host atom (or atoms if it's in a bond). This is why electricity (moving electrons) can easily flow in metal wires, but has a lot of difficulty flowing through most non-metallic materials. This is why your lamp can't zap you through the carpet when you're on the other side of the room.
With carbon, it normally bonds in such a way that electrons can't move, and electricity can't flow. But, there are certain situations where three or more carbon-carbon bonds can be conjugated, and in this special case electrons can move along the conjugated bond. In chemistry we use conjugation to control some chemical reactions. But also, we are finding new ways to make millions, billions, or even more carbon bonds be conjugated together, so that the entire chain of bonds can conduct electricity like metals! I personally had a chance to work on a technology to create carbon-based solar cells, in an attempt to replace expensive metals in solar panels with cheaper carbon.