Wow, that is pretty scary stuff, and that's the kind of mistake I would easily make. I think we tend to blindly assume that if we can buy stuff it must be "relatively safe", without realizing the potential hazards of seemingly simple combinations or methods of use.
Then again, sometimes shit just happens. A couple years back I was in the attic treating some termites to terminex, and a few drops accidently dropped on a hot spot light I had. For about a year my leg muscles were twitching, very low endurance, high pitch in my ears all the time...essentially felt like calling 911 almost daily as it really felt like I was going to die. Coincidently I had taken Keflex penicillin for an infection at the same time, so the Doctors still don't know what really occurred, maybe bad drug reaction, poisoning from that interaction with the chemical on the light, or something else, who knows. But anyway, now I am much more careful with chemicals & such. Live and learn, sometimes the hard way.