This is a common form of punishment for certain crimes in Singapore.
The person is smacked with a bamboo stick on his buttocks, sometimes on his back, depending on what the person did. The person is left with deep cuts and torn flesh and muscles and then treated by the same police who applied the punishment.
I'd just tell them to feed me rat poison, or make me eat earthworms ... but not that shit. Hell no. I'm sure glad I don't live in countries like that, cuz they're would've whipped me so many times, I would have nothing but bones for an ass.