One time when I was 8 I swallowed a lot of bubble gum and then went to stuff and discovered I had blown a bubble with my ass and showed my parents.
I don't think it works that way.
Not really a secret but when I was littler I had gastro and was taking an explosive stuff when I felt the need to throw up so I lent to the side off the toilet and threw up in the bath next to it, however, as will be known by people who have had bad gastro/food poisoning before, when it comes out one end it comes out both.
So basically I threw up in the bath and projectile shat steamy diarrhoea all over the wall, I didn't know what to do so I just left it there lol, my mum came to me like an hour later like wtf happened.