I suffer from what the VA calls an exaggerated startle response (among other things). Unexpected loud noises and unexpected bright flashes of light shoot a jolt of adreneline straight into my heart and raise my stress hormones very high. Very high. When one of the Bubbas at the range uses that crap I have to leave before I shove a few pound up his butt and ignite it.You can use these binary explosives in "any" amount as long as you are on your property and exercise "appropriate" safety.
Tannerite is one brand but there are others. The "explosions" are too slow to do much real destruction but they look cool!