They love to hit the walls lol

If the controller gave them an electric shock every time they hit the wall or another car, it would have one or more of the following effects:
1. They would try to harder not to hit things while playing the game
2. They would stop playing racing games and gravitate towards games that do not shock you when you screw up
3. They might be afraid to use or even touch the console ever again
4. When they get behind the wheel of a real car, they'll be much more likely to treat it with the respect it deserves (best possible outcome).

or they would never touch video games ever again

Lol

I used to play Mario Kart with my sister and she kept on banging into walls.

same

as someone who played mario kart at age 6, i can confirm this

If I had a child and they played mario kart like this I would break their neck and every rib, then snap their ankles into 50 parts, and then send them to the adoption center.
I would say they're retarded.

P.S I'm a sweaty tryhard on Mario Kart, I like to win

just a tad gruesome

that's the point

yes

that wuz like me on rainbow road wii

Rainbow road Wii is torture

i'm better now

ok

hmmm

why no funnier crash