As a kid I heard the “bubble gum stays in your stomach for 7 years” one, as well as The Choking Doberman, The Mexican Hairless Rat/Dog, The Hairdo Spider, and The Singing Dental Fillings. A science teacher told us the one about the car door with the bottle in it and a note saying “You found out what was rattling, you rich bastard!”
And of course we all knew that certain fast food restaurants used worms in place of ground beef and that if you poured pop rocks into your ear and then poured soda into your ear your head would explode. And that bar codes on cigarette packages could be used to operate dialysis machines.
There were also certain local legends, such as that there was a Satanic church on 3rd Street and the Satan Worshippers hung around downtown handing out free drugs and porn to kids. And there were spooky places where some sort of deranged psycho was said to live and lure his/her victims to their doom. Somebody’s brother/mom’s boyfriend/best friend’s cousin supposedly had seen something weird there, so that was proof the place was haunted.
Oh, and the good old “Led Zeppelin or the Rolling Stones or Kiss sold their souls to get a recording contract and if you play their records backwards you can learn how to sell your soul too.”