For some reason putting a Tinkers' Construct tool that "stacks" (such as bolts, arrows, javelins, throwing knives etc.) in a drawer will make the tools "stack" number visible through walls.
4 and 2 is 42, but in this instance it might mean more. Lets go deeper. April is the 4th month of the year, 2 is apart of the number 20!! do you guys know what this means!! 420! ZOMG, someone get me some dank mlg memes.