I recall a time when I had a small asthma attack and was too lazy to get
my puffer out and use it. It happened while I was trying to open a box of
Baking Soda. When it opened, it spill all over causing dust in the air
which I then accidentally breath in. Suddenly I noticed my small asthma
attack going away. Normally my small asthma attacks get worse not better.
I don't recommend anyone try this, but was it a coincidence?

I also remember the times I'd arrive at a swimming pool with an asthma
attack that went away as soon as I breath in the strong chlorine air from
the pool. The more air I'd take in, the easier it became to breath. In
fact I never recall having an asthma attack at or near swimming pools.
Sometimes if I drink water and it goes down the wrong way and I choke on
it, I cough and trigger an asthma attack. And yet, if I accidentally do
the same on swimming pool chlorinated water, it never triggers one. This
particular swimming pool where I experience this is outdoor and you can
smell the chlorine several feet away but the water itself tates very
salty! Is it the salty air? Or the chlorine?

As anyone else experience unusual things that stop an attack
that would other wise be expected to do nothing to help?

Another I find warm bath sometimes calm small asthma attacks.