it has happened to me more often over the past few yeas. I didn't develop asthma but a few years back as well, but being around people smoking does tend to make me hate life. This problem is easily remedied by simply leaving the area, but i always try and tough it out for as long as I can only to completely regret the decision. I have actually began to not try and tough out the occasions for the past few months, and have been very pleased.
"boot to the cools!"