Quick google search and... Tada
And now, all DBR posters who clicked on that link are in an FBI or DHS database...
I've been thinking about the toothbrush thing - I believe the saliva would cause the sodium compounds to dissolve and kickstart the exothermic reaction. If they didn't, rinsing with water would be a bad idea, as well. In fact, in the event that you find yourself with Drano in your mouth, I'm not sure what you would do to save yourself. IIRC, Drano was used as a murder weapon at least once or twice.