Floor overlay that zaps any players/mobs standing on it when powered, much the way bare copper wire does. If this was already brought up, by all means delete this post.
I'm thinking that it should be an overlay like the sticky resin and snow, the way they stick up a bit from the block they're placed on. It should also be able to be hidden with the painter. I know that the tesla coil block sorta does this already, but these floor tiles are more localized.
They would be a great addition to quote, "Create obstacle courses of Metal Poles and Rubber-Sheets!"
I personally would love to see them in IC, but you know how it is with most ideas. Just want to put this one out there.
-Cybertron7