discussed here https://news.ycombinator.com/item?id=45979220

in other news a cern, they are gathering up all of there missplaced and discarded blocks, so that they can play with them again, but as some blocks weighs 15000kg's and were left burried in random spots, it's not your average play date. one of the things that the anti hydrogen production is bieng used for is as a test mass in a gravitation experiment, which definitly has the wooo!, good idea factor!