On the banana skin theory .......
When I was 19 and couldn't source weed once, I decided to put the dried banana skin theory to the test - nothing ventured, nothing gained.
Smoking cigarettes in pubs was legal in the UK back in the 1970's, so I skinned up a "joint" (see what I did there

) and proceeded to stink out the pub with acrid burning banana peel smoke, so quickly stuck the "joint" and skin back in my sports back. End of experiment - no effect at all.
Fast forward a few days and my father challenged me when driving me to my part-time job, showing me this small baggy of brown vegetable matter. "Your mother found drugs in your bag when she went to clean your sports gear. She's really angry and you'd better have a good explanation. You're in real trouble".
Look Dad, your not going to believe this, but it's actually banana skin. Said I.
Oh really! You expect me to believe that? Said he.
Yea - I know it sounds silly but it really is.
Him: "OK let's you and me drive straight up to the police station and I'll put this on the counter and see what happens".
I was starting to panic. The police in those days wouldn't know from looking at it what it was and would probably charge me and send it off for analysis. It would probably get into the local papers and when the analysis came back that it was dried banana skin ........................ I would be the laughing stock of the village.
I managed to talk him out of it (he was actually a very cool guy, but scared of my mother!!) and a crisis was averted.
No more banana skins for me ..... just proper drugs