Exploding plastic bottles: I would like to ask about the demonstration of HCl and Al within a plastic bottle which explodes when the level of hydrogen gas builds up.

Exploding plastic bottles: I would like to ask about the demonstration of HCl and Al within a plastic bottle which explodes when the level of hydrogen gas builds up.
Whoosh bottle: Is using isopropanol as a fuel safer than using ethanol or methanol?
This online resource looks at the emission spectra of various cations.
These online resources show various aspects of combustion reactions.
The four links show the reactions and give explanations for the observed phenomena.