A friend succesfully managed (once) to get it to work when we were 12. First we lightly grilled and boiled the bananas and mixed it with some reseve rolling tobacco that his dad kept above a kitchen cabinet in an old biscuit tin. We smoked one joint and then collapsed onto the sofa. It never worked again regardless of how many times we tried.

A few years later his dad invited us to smoke a joint with him while his wife was away - and let us into his secret stash of premix, squestered in an old biscuit tin, stashed above a kitchen cabinet...