In many Korean restaurants, there is a button on each table with which to call service. When you press it, a bell rings and someone comes promptly to your table. It's a great detail once you get used to it. When we first got here, being the polite and passive Canadians that we are, we were at first reluctant to so obtrusively call a waiter instead of just waiting for someone to happen by. As it is, nobody minds and because they are expecting you to ring them, if you do not then you might wait for a long time before getting any service.
When you pass money or anything else of value to a Korean, hold whatever it is with both hands. Alternatively, you can hold it with one hand and touch your elbow with your other hand. I think the latter is an informalisation of the former.
The Koreans of Daegu love hiking. The city is surrounded by forested mountains, and riddled with trails. On nice summer weekends there is an exodus to these mountains, and the trails fill up with people decked out in hiking gear.
In Canada, there are people who bike to work every day and yet wear the most scientifically advanced biking gear, and have two water bottles strapped around there waste. You see the same sort of thing here, with hikers. On a three km trail you'll see people with titanium climbing sticks, special shoes, and vests loaded with pockets. These guys could survive for a month in the Amazon Jungle decked out like this. Anyways, it's just a funny quirk of some of the population.
So that being said, the hiking is really fun. Even though the trails are generally crowded on weekends, they are still really nice and fresh air is always welcome. Give it a try!