By default I think they should be organised displays only but, even then, some of the booms at the display we went to last night were
insane... there were one or two that made my jacket visibly "blast back" a bit
. Plus, the ones that got the biggest "oooooh"s weren't even the big bangs, they were the ones that go with a little "pop" then spread out over a massive area, then sort of "fizzle" brightly as they fall. The ones with the loudest sounds weren't actually all that impressive visually...