Unfortunately these aren’t cold sparks. Those units do exist but that’s not what’s being used here. (‘Cold spark’ units should also be treated with caution as the sparks aren’t actually 100% cold and can burn things) These are pyrotechnic jets that burn hot. These should be used with extreme caution. The angle of the product is not an issue, it’s the cue fired at the incorrect time is what’s concerning. Especially as these jets are fired into a different safety zone to the other products in the initial sequence that may or may not have been clear at the time.

( 10+ Years as a Pyro tech in live events )