Dining tonight at a place that happened to be across the street from Sam's Club in Midland, TX......upon leaving Low Tire light came on.....quick inspection revealed a large screw protruding from left rear.....pulled across the street to Sam's exactly at closing time.....I explained my problem and the employee offered to stay late and repair my flat.....he put my truck on the rack, took the wheel off, dismounted the tire, installed a patch, rebalanced the tire, reinstalled the wheel, used a torque wrench on the lug nuts......fixed & back on the road in less than 20 minutes......refused my offer to pay.....free flat repair.....of course I was shocked, I was expecting to pay at least $10 or $15.