Why did Garen fail his driving test?

MY CAR AND WHEEL ALWAYS FOR DEMACIA!

"Garen... we need to talk."

"Yes, Prince Jarvan?"

"I got reports you were driving through a school with an automobile?

"Yes, sir."

"I was very disappointed in you, Garen."

"B-but Prince Jarvan! It was a Noxian school!"

"I know. Which is why I'm proud of you." Pats Garen on the head and walks away

[slayer-pantheon-thumbs]

Tbh I like your answer better

You can drive a car in a bush. You shouldn't, but you can.

{quoted}

Spin to win doesn't work here sadly.

Ugh, beat me right to it

Yield in this context refers to some rules of driving. You are supposed to yield the road to other drivers in certain situations because they have the "right of way".