It's bad to assume that you aren't vulnerable to harm.
Tyson is playing basketball in his driveway when he loses control of the ball and it bounces into the street.
Tyson wants to go get his ball back, so he can keep playing in his driveway.
Tyson stops to see if there are any cars coming, waits until it's safe to proceed, and then goes to retrieve his ball.
Tyson runs after the ball and into the street without looking whether any cars are coming.
Tyson safely returns to his driveway with his ball and happily continues playing basketball.
Tyson gets hit by a car, breaks his leg, and has to be taken to the hospital.