Yellow Lights
GTA- People stop like it was a red light
Real- People go as fast as they can
Shooting people's heads
GTA- The head disapears and they die
Real- They die with their head still on
Jumping on top of people's cars
GTA- You can stay as long as you want and they don't care, even the cops don't care
Real- They'll probably stop and freak out
Airplanes
GTA- You can nosedive into the water and just get out of the plane and be fine
Real- You're dead
Police car with siren on
GTA- Cars swerve off the road and usually crash
Real- People slow down or stop
Gas stations
GTA- You punch the pump a few times and it blows up and kills you
Real- You punch it and people give you wierd looks
Deserts
GTA- There are roads in the desert and the desert is surrounded by water
Real- No roads or water
Fast Food
GTA- Salads cost 10 dollars, and if you try to rob the pizza place, the cashier will pull out a shotgun and chase you
Real- Salads cost 2 or 3 dollars and they don't have shotguns
Getting shot
GTA- you get shot 20 times before you die, and you can still walk and run after you get shot, and to heal your bullet wounds, just go eat some food.
Real- you get shot once, and you are seriously injured or dead
Driving
GTA- People honk all the time
Real- People rarely honk
Car crashes
GTA- You both either beat each other up or you just keep driving
Real- If it's minor, you exchange insurence and phone numbers, if it's big, traffic is blocked for hours and there are police cars and ambulances all around the wreck.
Parking cars
GTA- Steal 5 cars, park them all next to each other, drive far enough so you can't see them, and come back, and they're all gone.
Real- When you come back, the police are waiting for you.
Talking in cars
GTA- You can hear them even when you're both in seperate cars
Real- You can only hear if you have your windows open, you're right next to each other, and you're yelling.
Buying cars and houses
GTA- You buy cars at docks and they cost more than houses
Real- Houses cost 5 times more than cars, and you buy cars at dealerships
Stealing jetpacks
GTA- You steal a top secret million dollar jetpack, and you can fly it around all you want, even in front of the police, and you don't get in trouble
Real- You steal it, and all the police in the world are after you and if you fly it, they'll immediately chase you.
Money
GTA- Your friend gives you 500 dollars and says go get yourself a beer
Real- If you're lucky, you get 10 dollars for a beer
Flowers
GTA- You find flowers just floating in random places, and you can kill people by beating them with the flowers.
Real- You buy flowers in a flower store and you give them to people as a gift.
Vilagante Mode
GTA- You get a wanted level for stopping a criminal.
Real- You get backup.
Mod shops
GTA- By painting your car a different color, it is automatically repaired. And you can't paint it orange.
Real- Your car isn't repaired, and if it's all wrecked, they probably won't even paint it. And you can paint it orange.
Also something funny I noticed in the mod shops is if you try to paint your car the color it already is, they say "You're car is already that color" but that acually means "You are car is already that color."
Taxis
GTA- If you crash or flip over, the only thing that happens is you get a smaller tip.
Real- They'll probably scream for help and tell you to stop.
Old ladies
GTA- They usually drive tractors or SUVs, and sometimes they will attack you with a shovel or golf club or something if you crash into them. They're also all fat.
Real- They usually drive little cars, and will probably have a heart attack if you crash into them.
Garage Doors
GTA- They won't open if there are too many cars in the garage.
Real- They open as long as you push the button.
Motorcycles
GTA- Slam into a cement truck head on going 80 mph and just fall off and lose little health
Real- Very seriously injured, or probably dead.
Water
GTA- Other than CJ, people instantly die when they touch the water.
Real- Most people can swim, or at least float for a while.