You're making it out as if the kid kicked out the entire panel. Most likely the kid threw something at the glass and it got a crack in it. Not a sign of superman strength.
If it is indeed reinforced glass (which is standard in NYC public schools for fire code reasons), it isn't superhuman strength - but he either threw something quite heavy quite hard that could have seriously injured someone, or he deliberately pounded on the glass with a heavy object until it broke.
That ain't normal. And, like I said, that is a suspiciously large 5 year old as described.
BTW - there are a ton of immigrant kids in NYC schools who do not have a birth certificate on file but only a parental affidavit as to their age.
These are often lowballed by the parents to allow kids to have less challenging schoolwork and for baseball purposes.
No — just the sign of a brat that needs a good butt-bustin’.