OK, so I am trying to help my friend solve his trauma. These are all the details I have:
He saw it in the mid-to-late '90s but that doesn't mean that is when it was made. No help there I guess.
There were kids involved, under some sort of mind control/body snatching. At one point there are football jocks, and one throws a football that turns into some sort of weapon by way of some TERMINATOR 2 looking silver liquid. The weapon then kills someone.
We know for sure that it isn't THE FACULTY or DISTURBING BEHAVIOR. Any idea what it could be?
UPDATE: NAME THAT TRAUMA SOLVED! Kudos to reader Ben Sher for naming it with PROM NIGHT III: THE LAST KISS!