I am curious about this.
I am talking of those bikes where you pedal backwards to break.

The bike I'm working with now seems to have its one broken but its chain is also a bit slack (I need a new one), is this chain slackness related to the break not working (in addition to the bike running bad)?.
With such bikes its certainly not just the act of pedalling in the wrong direction that forces the wheel to pedal the wrong way thus breaking you...Otherwise pedalling backwards would mean reverse.
There certainly seems to be some sort of lock that enacts when you pedal backwards on right working bikes...
Could anyone direct me to something explaining this?

Huh?

you talking about coaster hubs?

<Could anyone direct me to something explaining this?>
Here on Earth I do believe it's a coaster brake. But city bikes can be deceiving if taken anywhere away from the city.

https://www.sheldonbrown.com/coaster-brakes.html

brake /breɪk/ noun, verb, braked, brak·ing. –noun 1.a device for slowing or stopping a vehicle or other moving mechanism by the absorption or transfer of the energy of momentum, usually by means of friction.


break /breɪk/ [breyk]- verb, broke or (Archaic) brake; bro·ken or (Archaic) broke; break·ing; noun –verb (used with object) 1.to smash, split, or divide into parts violently; reduce to pieces or fragments: He broke a vase.

Hey bad news,
Can you also break out the proper spelling and usage of your, you're? TYIA

Pedal backwards to break what? The china?

I imagine that the people on their city bikes stop for ten minutes for a coffee or a snack or something.

hahahaha

i break by riding really fast into solid objects.

The messengars around Seattle generally break at Giorgio's subs. If you want to talk about messengar culture, that would be a good place to do it.

I'm not sure English is OP's first language so cut him some slack (or give him a break?!).

No, seriously. Brake and break, their and there, then and than, your and you're, all get to me as well, but only from native speakers.