This mod adds a couple features to confuse and troll your friends:
Stacked trapdoors
The salb: a slab that has no outside texture but an inside one
a wrench to turn and move a block
fences can now be placed on walls
and stone can now be cut to insanely small peices with a stone cutter
All credit goes to EightSidedSquare:https://www.youtube.com/channel/UCm9WKMrkb005KoZki70X_7g
I just compiled the mod so people could download it easier.
to know how it works check out his video on this: https://www.youtube.com/watch?v=nCClalcgGsY