Uh... whats the experiment they are doing?
seeing how much weird shit psychic kids can do so they can maybe use them for a weapon or infinite energy or whatever. This is the plot to at least 10% of science fiction movies. Once you establish that psychic kids exist you should just assume that the government is experimenting on them to try to turn them into a superweapon.
What happened to this "Akira" they talk about occasionally?
he got too psychic and exploded, thereby destroying Tokyo, which is why they now live in "Neotokyo". It's a thinly veiled reference to Hiroshima. After that they took what was left of him and put it in a big freezer under a stadium. Kinda like canoptic jars in Egyptian tombs. Or like the samples of smallpox in CDC labs that we keep "just in case". Maybe all of the above. The allusions are all over the place and I honestly think they were just throwing stuff at the wall.
Why does Tetsuo turn into a blob?
he also got too psychic and exploded, but in more of a body horror way than a Hiroshima way.
What the fuck is this random gibberish and random images I'm watching?
consult your physician idk
Source: I watched Akira one time in the late 90s as a high school student.