I got a 2oz bottle of Fox Labs 5.3 in the mail today and wanted to make sure it works if I'm going to be carrying it. I didn't really want to get a face full of it, since I had to go to my night class (or that's at least the excuse that I'm sticking with ). I sprayed a burst into the air, walked into it and took a nice whiff. The effects weren't immediate; it took a second or two, but I started coughing uncontrollably, my eyes started watering and my face, nose and eyes started burning. Surprisingly, it was not a very pleasant experience.
I ended up going to class still coughing a bit, but the burning was pretty much gone unless I touched my face or eyes, which seemed to reactivate it. I'm glad I did it though, I know to steer clear of an area after I use it, because just a bit lingering in the air will be very unpleasant.
I have another OC spray that I bought from Cabelas a while back that's a stream, its labeled 2%, 2M SHU. I was going to give it to my roommate's girlfriend, but don't want to if it doesn't work, so depending on how busy this upcoming weekend is, I might post a video of me getting sprayed with it if anyone is interested.