The dispersal units were even smaller than the test tubes. Shaped like PEZ dispensers, these brightly colored boxes had stickyback sections you could peel off to affix the unit to a wall or a ceiling. You could in principle pop the top and let the Brownian motion do its job, though the unit did have a tiny vibrator to facilitate the process and a miniature timer to specify the pop time. And of course a normal person, popping the normal top without the appropriate special twist, would get a peppermint-flavored PEZ-like candy. Sugar-free, naturally. Khalid then performed the other careful dance of removing the PEZ dispensers from biosafety and sterilizing their exteriors. Really fine powders like this were a pain to work with since the powder tried to adhere to the plastic surfaces, but ev

