Oh, both are available from a chemist....PP is in the form of a snake bite kit, and glycerol is in the form of anti-furry tongue stuff for babies.
Another one....but i never said try this. Put a bit of petrol in a jam jar, put the lid on and swish it around until only the sides are covered. Add a bit of PP put the lid on and throw the bitch as hard/far away as possible....then bacdafucup...
Warning, people have said depending on the measurements used it can pack an explosion roughly equivalent to 1/2 stick of tnt