I always thought that the chorus to the Cutting Crew song "(I just) Died in your arms" went "Ha-rah, I just died in your arms tonight, it must have been some kind of cheese." Makes sense, there are some nasty cheeses out there.
A childhood belief about misheard lyrics

others believed things like this
- I thought a major general is more powerful than just a general (which still kind of makes sense to me)— Demond
- I thought there was some video games so hard that if you died on them you also died in real life!— Kakuri
- When I was little I believed when an actor died in a movie, he died in real life.— Ben
- I used to believe that when we died (and animals) died they were picked up in a bus with there name on it.— Lawny
- We used to think that if you ran swinging your arms around, you would run faster. — Christine
- that if I flapped my arms hard enough, I could get airborne.— DeQuendre