I was carrying a fire extinguisher in the car as we had to have it for a test on our team car's engine. I'm driving home with it tied upright, on the side of the trunk with a strap the car has particularly for this. Fits like a glove.
Driving on a roundabout I hear something fall, slide, and then hear like if a million rocks were falling. Cue mild cloud of dust while I think "fuck" and open windows, turn the hazards on and pull over as best as the cloud lets me see, while it clears. I get out and I already know what it was. I let it settle and open the trunk. Extinguisher has loosened off the strap and fell sideways to the trunk floor. Sideways hit has apparently knocked the safety pin out and the left turn inside the roundabout slid it to the right side of the car, pressing the handle.
Luck? Quite a bit of it. Good luck, fucking none of it.
Had to clean my fucking glasses because the dust even stuck to them
I got home and this is the result. Thank fuck I had 2 cardboard boxes on top of the actual trunk floor and I got part of it out after this picture.
Let's see who's available tomorrow to clean this mess, because I don't want to ruin my vacuum and my lungs.
Got lucky it was on the trunk and not the seats, and got lucky there was no actual fire. Could have been worse, but
FUCK
Im glad this didnt turn into an accident, thats some serious Shit right there you could have hit another cae, a wall, a tree, Damn... What a mess to clean on the other hand 
You need an industrial vacuum cleaner for this crap. Normal one will die. This is so powdery. Or remove the floor and side panels and attack it with a high pressure washer. But first make it wet with a garden hose. That dust is horrible and dangerous.
