I have no idea what LOOPERS was all about and that screaming kid in particular.
And why was everyone homeless?
Can some of you getbig movie fans explain the details?
And while you're at it, how about a simple explanation of CLOUD ATLAS.
Hell!! I'm still trying to figure out that 1939 OZ movie!
The kid was gonna grow up to be "the rainmaker," a guy who would attempt to assassinate all loopers, which is why Willis was trying to kill him. At the end, we see the kid's mom accidentally killed by Willis instead, which is why the kid would eventually target loopers in the first place ("first place" is sorta where the time travel thing gets tricky). Anyway, Levitt prevents this future by killing himself so that Willis couldn't grow old and pull it off.
The kid made such a fuss when he got upset because he had telekinesis. Also, his first "mom" was murdered too, which made him prone to emotional outbursts.
The homelessness was just the screenwriter's take on a rather depressing future.