File:ConcretePowderUsage.gif

Summary
Jeb tweeted this animated image of what appeared to be colored sand, but in reality was the new concrete powder block.

In this image, Jeb breaks a supporting iron block which allows a block of sand and two concrete powder blocks to fall and be pushed by a piston into the lake below. The sand falls below the water, but the first concrete powder block solidifies on contact with the water, and the second concrete powder block rests on top of the solidified concrete.