Public firework displays are not your average home fireworks. Where as the ones you might let off in your back garden look like the rockets you can buy in a shop these fireworks often look a little something like this:
All of those tubes contain small mortar like cases of fireworks that look a little something like this:
And then they are rigged up to a computer which makes them go off at certain time, often in sync to music. When a launching mechanism fails though they can all go off at once which results in this:
