I'll only have about 24 hours of free time in Pusan. A couple hour day trip is kind of out of the question. From the few travel books I've seen and a couple websites I've been to, it looks like there isn't a whole lot there. I guess I'll just eat, drink, and buy some cheap winter clothing.
I'll be in Thailand, however, for about 5 days. Although other than visiting Ayutthaya, I don't know what I'll be doing.