Olympiacos vs. PAOK is the biggest soccer rivalry in Greece, so when Olympiacos visited in the semifinals of the Greek Cup holding a 2-1 edge after a victory in the first leg, PAOK fans went all out to give their club a home-field advantage. Prior to the game, the entire field was surrounded in a blazing ring of flares.
Imagine walking onto a field that looked like this.
After 60 minutes, PAOK leads 1-0, so this may have been an effective strategy.
PAOK fans also somehow managed to dump fish on the bench seats of Olympiacos players.
(Thanks to Dirty Tackle for bringing this to our attention.)