You've played too much Brawl when...
You light yourself on fire, and run up to random people screaming "SUPER SPICY CUUUUUUUUUUUUUUUUUUURRRRRRRRRRRY!"
You get high, but the smoke ball is nowhere to be found....
You try downing every piece of food in one gulp.
You take a roman candle and pretend it's a cracker launcher, running around the mall, comboing people with each shot.
You eat some Falcon Lunch, and with each chew you Falcon Munch.
You go into a Burger King, and tell the manager : Show me your food!
You and someone else run around the city, dressed as eskimos, and hit whatever is in your way.
You think the first person on the moon was Captain Olimar or Samus.
You do Great Aether in soccer, and actually score.