As stupid ideas go, this is really stupid.
A couple of idiots in Phoenix, Arizona have been caught on camera setting light to a fireworks display in a Walmart. Which probably seems like a funny thing to do until the whole thing chain reacts, sending sparks and explosions travelling in all directions.
Thankfully - for both our entertainment, and for the purposes of catching the offenders, the whole thing was caught on security camera. More thankfully, no one was hurt, with the local fire service able to contain the fire before it spread to the rest of the supermarket.
The crime is a serious one - it could be judged a class two felony, which is just below a murder charge in the US, with the two suspects facing a prison sentence of up to 20 years.
Not the brightest sparks then...