Amazingly, this has been a thing in RL for ages. It's not usually so public, though, or so many ponies at once.

seems more like something out of real life

I've heard of horsies like this in a sexual context but there's like a kid in that carriage.

I think it's a bunch of adults, the drivers bench is just higher, so the people in the carriage look smaller.

meh, it's not hurting anybody