When I was living in Japan my folks decided to take us all to Bangkok, Singapore, and Hong Kong.
The trip was great but while in Hong Kong I goofed pretty bad. We wre riding an escalator in an outdoor plaza and I thought it would be fun to hop up and sit on the rail, ride it up.
I set off some kind of alarm and the escalator stopped and all these people were looking at me, which was pretty bad. Then all these cops carrying MP5's started swarming the place and I freaked out. Luckily I had already hopped down so I just pretended that I didn't do it and walked quickly away from the plaza with my family.
That was a great trip though... those three cities in 12 days, my digestive system was in complete shock for a month after that