I couldn't figure out how to upload a video clip to Facebook, so let's see if it will work here. This is older son practicing a second dan karate kata or form called Am Hak (Crane on a Rock) at the base of the Imperial Monument in Hue. The ledge he is doing it on is a bit under five feet deep. It's also pockmarked and dotted with shards of glass; hence, he's doing the kata in sandals rather than the traditional bare feet.
And to be fair to older son, here are two still photographs of yours truly doing a simpler form called Elbow 1 on the same ledge. Photos also exists of younger son doing the same simpler form, but since they're on his camera, I don't have access to them.
The plans for the weekend have changed, "weekend" being Sunday and Monday, the two days the husband doesn't teach. Instead of spending Saturday at the beach, we'll be in Hoi An, an important trading port from the 16th to 18th century; it was named a UNESCO World Heritage Site in 1999. We'll also visit My Son, a temple complex that was active longer than any other in Southeast Asia, including Angkor Wat. I'm hoping that the terrain around My Son will be enough of a jungle to allow older son to perform the same kata there in response to a challenge from one of our master karate instructors. Monday, we're still set for a tour of the DMZ and other war sites. If the part of the Vinh Moc tunnel that we visit is the one that's two meters high, he'll do it again there. Have kata; will travel.