While charging at Gilroy yesterday, I noticed another Tesla pulling in. Had to get out and appreciate his 19" turbine wheels and watch him plug in. The car charge outlet turned green, but in about 5 seconds it went to red and refused to charge. Sooo, what to do? Try another charger, right? But another charger gave the same response. He moved to a third spot, and I was worried that it was his car, not the charger. Sure enough, it, too went red about 5 seconds after plugging in. "Better call Tesla". I went back to my car, checking on mileage to Fremont (only 41 miles, thankfully), but in a few minutes I could see things were working. I wondered what the phone call had figured out. And although I had never heard of it, I felt it might be of interest: When plugging in, the driver had kept his thumb on the "open charge port" button on the charge cord handle while plugging in. For some reason, the charger and the car could not shake hands while that button was pressed, and went into full stop. The solution was simple. Just keep your hands off the charge port opening button after the door is open. And the car charged fine. May be good to know.