Impreza Fender Bender No Start

So my wife got into a fender bender this morning with her '98 Impreza Outback Sport. There is very little damage, only a broken turn signal and a cracked bumper on the drivers front. After it happened she turned off the car, checked the damage, started the car and parked it in our driveway. A few minutes later the car wouldn't start. It sounded like it was getting spark which leads me to believe it was a fuel delivery issue. About an hour later I went to try the car again and it started right up, no weird noises or anything!

Any idea what is going on? I don't want her to be stranded as it is roughly -2 degrees here today. Could this be something serious like a skipped timing chain? I read on a forum that these cars don't have inertia switch's but I found an inertia switch for the car on Rockauto so I don't know who to believe...

I'd just check where the inertia switch would be. If there is one, ya know what to do. It almost sounds so me like there's something loose in the wiring.

Check that none of the fuses and relays came unseated?

As I understand it, there is some interia-based fuel cut-off switch in these cars. I remember when I had my WRX, I got out of the car to get propane from a gas station or something and I had my dog in the car. He was walking around in the big wagon back area, and when I got back to the car just a couple minutes later, the car wouldn't start!

I opened the hood and looked for loose wires or dynamite or something, didn't find anything. I closed the hood, got back in the car, vroom! Started right up! When I posted about it on the Impreza forum that's what they all said it was.

Could an important chassis ground have been disturbed in the accident? I know nothing of Subies, but if there are any grounds in the area of the impact they may need some attention.

Bad crank position sensor caused something similar on my dads 96. Is the check engine light on?

Almost all the wiring in a Subaru between the passenger compartment and the engine goes through the LF fender. A LF fender bender could have damaged that area. Main power Distribution is there too - right behind the battery.

Even though it sounds unlikely, I'd check the fuel reset, likely in the trunk. Weird E36 M3 happens.

No inertia switch. The battery is in the left front. My first guess would be the neg ground by the battery getting jostled.

Stranger things have happened. In my old A4 1.8T.

The exhaust after the turbo broke, and somehow that caused the ECU to fail at the same time.