I guess my next question is, how much was he spraying? You said 20 seconds. That is a LOT of deodorant! How small is the room? Was it ventilated? I agree with JLC that is is good on you for trying to get a warning out, but I also agree with the others that you need your ducks in a row before presenting such material.
BTW, typing on the iPhone is zero excuse for bad punctuation or grammar. I do it all of the time, and it is indistinguishable from when I am on my laptop.