I was just finishing uploading my MX/hurts Like Heaven/Yellow/In My Place video to Youtube. I'm hoping they don't block it to me, it's 14:52 long so I should be fine with their 15 minutes curfew, but you never know...
HCl is really easy to find. You might even have some of it lying around the house, it's widely used for thorougly cleaning bathrooms and kitchens. If you don't have any at home, check out your nearest hardware shop or chemist, and ask for "diluted muriatic acid". You should get something like this:
That ~20% is the highest concentration you can get without having an investigator license or something. But the Cl+Al "bomb" that I shown you works perfectly right with that concentration