Better right foot test (NorCal specific): 1) You're on the I5 South, heading to San Diego. The fuel low lamp just came on and Fresno is still 30 miles away. 2) A blonde model type in a red Ferrari just popped out from behind the 18 wheeler that's been riding your ass for the last 45 minutes. She gives you a smile as she pulls away in the left lane. 3) You glance at the odometer and do some quick mental math. 4) Your right foot moves down, There's nothing you can do about it.