When I showed him the sketch for this strip, Fox said something like “it’s too bad you don’t have an airbrush for that poof.”
To which I replied “actually, yes I do…”
I’m not really the most skilled with an airbrush – but in this case, I wanted to draw a giant mess, so it worked out pretty great. 😀
While I’ve theories, I’ve yet to research the physics behind why opening the unpressurized can resulted in a mass evacuation of its contents.