When...
-You put MP3s of songs from GT 1-4 on your PS3 hard drive to listen to while you race, pining for classic PS1-2 memories.
-You use certain racing games like ModNation Racers as "GT5 practice".
-You use MNR's track editor to build Gran Turismo-like courses, or set the number of AI opponents to 5 like the PS1 and 2 days, even going as far as using the Pure Race settings.
-You create a MNR Mod like the drivers' suits in GT5.
-You play NASCAR 09 as the drivers' cars that are also in GT5...way too much.
-You have dreams of driving in Tokyo R246 or the other courses.
-You watch the One Tree Hill episode "I'm Wide Awake, It's Morning" - from Season 2 where Nathan (James Lafferty) goes too fast, hits the wall and crashes a NASCAR Nextel (now Sprint Cup) Series Chevrolet Monte Carlo (now Impala) and when you play GT5, you try to force an AI driver to make that same mistake in an A-Spec or B-Spec event in a NASCAR Sprint Cup car.
-In the U.S., you watch shows such as The Price is Right or Let's Make a Deal and if a PS3 is offered as a prize (and if you already have GT5), you check to see if GT5 is one of the games that comes with the prize.
-You watch the former as explained above to see if the car offered as at least a Pricing Game or Showcase prize is playable in GT5.
-You watch shows such as Top Gear and (in the U.S.) SPEED's Battle of the Supercars to see if cars featured are playable in GT5.
-You wear a racing suit similar to the driver models in GT5.