1 of my friends wont ride in the car anymore. And I wasnt pushing it at all. I drove one him to a party and he opted to drive another guys mini van home with his 1 year old twins in the back to avoid getting back in the cobra. I guess for him, it was too much power
Another way to tell you have enough power: When you can pass 2 cars at once and do not have to go to full throttle.