Everyone is physically ok, but the kids are probably a bit emotionally scarred.
Last week was Diwali and DH's family (as far extended as cousin's boyfriend) came over for food, sweets, drinks and fireworks. It was kind of a normal get together, but a lot bigger than usual (11 adults and 2 kids) and the first time I've seen them do fireworks.
SIL arranged the fireworks because she wanted her kids to enjoy them. We'll call the 4 year old N4 and the two year old N2. She bought the fireworks and wanted 'something with a bang' (famous last words) to get the kids excited. You can probably see where this is going. I'd already told DH that I wanted for us to avoid setting off any fireworks so if anything went wrong, we couldn't be to blame (SIL likes to place blame on others).
We waited for it to get dark to set off fireworks. N4 and N2 were already up past their bedtime and had been filling up on sweets and snacks and absorbing the attention for everyone, so we were already in risky territory (they were hyper and tired).
When we went outside, N4 said he didn't like fireworks. SIL told him 'Yes, you do. You love fireworks!'
N4 and N2 were held by adults and we were all around 10 metres from the fireworks.
BIL (N4 & N2's father) lit the first one. I assumed he knew what he was doing - he's in his 30s and while he is a city kid, he seems to have common sense and his kids were around, so he's best to judge the safety of the situation.
I grew up in the countryside and we were always far away from the fireworks (but we did have a lot more space), had a set up so they wouldn't go where they weren't aimed and made sure an adult who knew what they were doing oversaw the whole thing.
Here in London, there's just a tiny garden with a tree in the middle at FIL's house, but SIL's house has a garden about the same size, but without a tree.
The first firework was one that shoots up and explodes (a traditional firework like you'd see at a big firework display).
Well, the first round goes up into the tree (apparently it's set up directly under the branches) and explodes. Everything is wet from the rain, so we're not too worried about a fire, but still... fireworks should not be set up under trees.
The second round goes sideways, toward the fence (!) and explodes.
The firework continue for all 6 (?) rounds, aiming wherever it chooses as we run inside.
Kids were crying. My heart was beating faster than it had in a long while. DH and I realised how serious it was and how bad it could have been, but most of the adults were laughing at the situation and at the fact the kids were so scared.
It turned out BIL hadn't secured the firework to the ground so it had tipped over and the force of each round projecting out was spinning it in a different direction.
DH went out with him to build a little case for the firework with bricks so it won't shoot sideways... or so we thought.
We carried on (I don't know why) and lit two Roman candles (the ones that shoot up about a metre continuously like an upside down waterfall) with no issues. The kids were inside looking through the window and seemed to enjoy it when it wasn't about to go off in their face.
The fourth firework was another one like the first. We've now got the bricks to stabilise the fireworks, the kids are safe inside and no one is crying, so we're all good, right?
The first round of the firework goes up and explodes as it should (but in the tree like before).
The second goes up, hits the tree branches (why they put it under a tree, I don't know... that's like the worst thing to do!) and it redirect straight to us. It hits the house and goes off.
The other four rounds continue, but I was too busy taking cover indoors to realise what happened.
Kids were crying, SIL yells to not do any more fireworks (why we did any more after the first one, I've got no idea) and my heart is beating even faster than it was before. It took me about an hour until I was actually calm.
FIL gives N4 and N2 new toys to distract them. SIL, BIL and kids went home soon after the mishap. Cousins took the fireworks to set off at home. DH and I recounted all the things that went wrong - the fireworks were set off under a tree in very windy conditions with no stabiliser and some of the adults had been drinking (not drunk, but still...).
Apparently, when SIL and BIL got home and put the kids to bed, their neighbours started putting off fireworks and the kids lost it again. At least no one got hurt, but it must have been traumatising for them.
The next morning, I noticed a burn mark on the outside of the kitchen window where one of the fireworks exploded.