The Phillies Phanatic poured a giant bucket of popcorn onto a Mets fan...because that's what good mascots do.
ALERT! ALERT! ENRAGED, POPCORN-ASSAULTING MANIAC ON THE LOOSE IN PHILLY!!!
They should probably add a legal clause on the back of your tickets that explains you're at risk of being attacked by a mascot if you decide to wear the jersey of the visiting team in the ballpark.
Hopefully that Mets fan has a good sense of humor.