When you open your inventory, craft table, furnace, Ench table, Brew stand, dropper, hopper, ETC. If your in any of those interfaces more than 15 seconds, when you quit it you will see a bunch of particles of every type (torches, rain, potion spirals, ETC.). Also, if you are in any of those interfaces for a long time, the overload causes the game glitch with an invisible GUI and invisible entities. Note the screenshot is from the build 1, but it still happening in the Official 0.15. My device name is there too (M4 SS4020).