How about testing something like this? I’ve always wanted to know if they work or whether the are just a damp squib?
Strange you should mention that, Mike.
Guess what I've got screwed to the side of my Hairyarms stand?
A double-barrel version...
They're actually quite good and work well. But the effect is only as good as the explosive and streamers/glitter in the party popper itself.
I've got a video somewhere (as I do). I think they're shown in this one...