Ok, I'll save you the details, there was wind (no big deal), I was too close to the street at end of the park and when I made my turn to land back close to where I was, the plane flew right into the sun. I got blinded and by the time I could have seen it, I tried to dodge a power/phone line and lost. The plane hit the line motor first, and the plane fell right onto the street outside the park.
I have to say I actually had a string of good luck there:
Plane damage isn't too bad
I had a look at the lipo and it looked like only the connector piece of it got compressed but the 3 sheets of lipo were otherwise unbent/unarmed. The lipo looked ok so I put it back in my car with the rest of the pieces and drove home.
A good 25mn after the crash, it self ignited on the desk I was working on. I was able to throw it on the ground and then away from close to my car where it landed while the 3 layers of lipo ignited one after another. Nothing actually got burnt despite an otherwise intense fire as the 3 mostly fully charged layers caught fire one after another (it shot pretty vivid flames 2 feet sideways). Sorry, I was too busy watching the fire to take a video :)
this is what's left of the lipo
Needless to say that on top of very limited damage to my plane, I'm very lucky that the lipo didn't self-ignite in my car's trunk, or later on when I wasn't watching it.
Moral of the story, a charged lipo that got any kind of reasonable shock is a ticking timebomb! Check Lipo Fire on youtube for more examples.