One time when I was 16 I had just gotten off work at Boston Market and was waiting outside for a ride from my parents. I had to shit all day, but up to that point I had refused to take a shit in a public bathroom, and I mean literally I had NEVER taken a shit in a public bathroom before.
Anyway, it got to the point where I was going to shit myself if some action wasn't taken. Like, it felt like my bowels had boiling water in them, I can't describe the horrible feeling I had in my lower stomach area.
Anyway, I manage to walk back inside and into the bathroom and I just let it all loose.
I shit you not people (no pun intended) there was steam coming up from the toilet bowl.
I think there was so much pressure in there it just started heating up and then BLAM! released it all.
It wasn't cold in there either, it was just straight up steam coming up from in between my legs, like a bomb had just blown out of my ass.
It was the craziest shit I ever took, and since then I've taken maybe 6 shits in public bathrooms, I still opt to hold it in unless it's an emergency.