Teaching at both a Thai public school and now a private-public high school here in Korea, I've seen some pretty funny punishments. My favorite from Korea:
A group of 5-6 boys forced to squat while holding their backpacks in front of them with straight arms. They were right by the big clock near the references to school, so it was also humiliation. Every teacher and student saw them being punished.
A group of students forced into downward-facing dog while being spanked wickedly hard. This was probably the most brutal thing I've seen here in Korea.
Commonly the students are just forced to kneel during passing periods and look at the ground in front of the teacher's office. The often look like beggars.
The only weird/wacky thing I'd do in Thailand was draw a box in the top corner of my blackboard and make the students stand perfectly still with one hand straight up in the box. In Thailand corporal punishment was the norm for Thai teachers. It was pretty sad, but I also felt for the teachers.
