When the Cleveland outfielder was being checked out after his failed attempt to catch IFK's gapper to the wall where he banged his head pretty hard against the it, verbal comments of celebration were thrown towards the Guardian players.
Once that happened, another Cleveland player climbed up the fence and started yelling at the fans for the "verbal only" abuse. (Not a good idea)
After that, the Bleacher Creatures started throwing bottles and what not at the Cleveland players in the outfield.
It got really bad after Gleyber's walk off base hit, to the point that Judge and Stanton went out to the warning track trying to tell the bleacher creatures to stop.
Hopefully we'll hear about multiple arrests either tonight or tomorrow.