Honestly I have no idea where this question would go, so I'm just gonna post it here since this has to do with roleplay and can kind of be taken as an idea.
My question is: what dictates an explosion on LoTC? Are we talking about Chemical Explosions? (i.e decomposition reactions or combination reactions) Or are we talking about Physical Explosions? (i.e things such as high pressure)
Now for my examples of these:
Chemical Reactions:
Decomposition:
When molecules decompose they produce combustible gases that create a wave which would be what you would call the "explosion" (for example TNT).
Combination:
Think Fireworks, things have to be combined together to make an explosion.
Physical Explosions:
These are pretty much explosions where high pressure builds up and bursts, these are the least likely kind of explosions, for instance over-inflating a ball.