I have a 2008 Crown Vic with just over 66,000 mile on it, the other day while parked with engine running and the gear selector in park, the a/c began to blow warm, dash lights went off, all gauges went to zero, headlights went off. the engine was still running so I attempted to put it in drive and the gear selector was locked in park. The headlights finally came back on and I was able to shift it into drive and drove it home (headlights, dash lights did not come back on). After getting the car home and letting it set a few minutes, I started it back up and everything was working as it should. What is going on with my car?