It was foggy as heck around here, and everybody was setting off fireworks. We were also playing with the spotlights and strong flashlights, enjoying the great backscatter. Plenty of lasers out, too. Heck, it looked like a WW II air raid or something. All of us had at least two mortar kits, and it was great fun for about two hours.
The M-1000 thing: M-80, M-100, M-1000 are all generally 'marketing' buzzwords.
They are, of course, illegal to buy, and there really isn't any 'standardization' with them anymore.
In a nutshell, all commercial firecracker type devices have only 50 mg of flashpowder in them. The 'regular' firecrackers are limited to 50 mg, and so are the 'water dynamite,' M-80, and Silver Salute type of fireworks. If you ever take apart a modern 'M-80', you'll see that the fuse dead ends into a little 'gel' capsule of flashpowder, 50mg's. Everything else is dead space.
IIRC, you can go up to something like 126 mg flashpowder for airborne fireworks.
Now, the old 'real deal' M-80's had about 2-3 *grams* of flashpowder, or 2-3,000 mg of flashpowder. They are something else.
Also, in the illegal market, you can buy tubes bigger than the standard M-80 sized one. These are the M-500, M-1,000, M-5,000 and M-10,000 devices you hear about. The general idea is that the title denotes the charge of flashpowder. In other words, the M-500 has 500 mg of flashpowder, up to the M-10,000's 10 grams of flashpowder.
I have tried all of these, and they are nutz in the very larger sizes. I don't do that anymore, because there's too much danger involved, IMO.
Interestingly, once you establish a 'connection' to a provider of these, uh, less than legal devices, you can buy them as easily as candy.
I was so into it at one point, that I had identified a supplier of Philippino Lolo Thunder and Super Lolo type fireworks. The Super Lolo's were huge, and would crater the ground.
No more, though. I wanna keep my fingers, and my bucks are beginning to go toward flashlights.