My wife and I were going to drive to a park today and when we were just a couple miles from home I thought to look at my tire pressure on the screen and was surprised to see 3 tires at 43 psi and one rear tire at 34 psi. I parked and got out to check my pressure with my tire gauge and it confirmed the low tire. I felt for a nail/screw and discovered a roofing nail in the tire. I drove home and jacked up the car and removed the tire and when I pulled out the nail I discovered a 2 1/2" nail that I don't think it would be possible to get in the tire by driving over it on the road. I can't imagine a nail this long being able to flip upright as you drove over it like a short roofing nail. I suspect a Tesla hater might have sabotaged my tire by wedging the nail up against the tire so that when I backed up I would drive the nail into the tire. I only used Sentry mode one time last weekend when we left the car for a couple of hours at a restaurant. Since I've only had the car for two weeks I can recall all the places I parked. I was at Walmart once and an auto supply store twice. From now on I'll set the Sentry mode every every time I park somewhere.