When i was younger i used to believe that when an airplane toilet flushed, it ejected the... waste... directly under the plane, hence the unbelieveable noise. Coming with this belief, i believed that if you sat on the toilet while you flushed, you could fall out through the toilet pipe. For these reasons, i always preferred to go to the toilet while we were flying over either the ocean or some unpopulated paddocks.
Only years later did i actually see sense that the airlines would not be allowed to do this. but that diddnt mean that i hated the noise any less.
A childhood belief about aeroplanes

others believed things like this
- I used to believe that when you flushed an aeroplane toilet the waste would just drop out of the plane.Anon
- I used to believe that monsters lived in my toilet and they ate my poop and urine when i flushed the toilet.Anon
- I used to believe that if I flushed the toilet before I showered, I would take a shower in dirty toilet water.— Chris D
- I used to think if I left the toilet seat open my cat would get flushed down the toilet.— G
- I believed everytime the toilet flushed a wave broke on a beach— Jenelle
- I used to believe that the toilet would suck me down if I flushed it.— :-)