One of my students posted a lesson she learned on Facebook: if your son is a 2nd degree black belt in Taekwondo, don't jump out and scare him in the dark. She's a student at my school, too. A green belt. Apparently she jumped out and yelled at him. He push-kicked her and she went flying across her bed. She doesn't blame him at all. She told me "that was my fault, I didn't think it through." I just thought you guys might find it amusing.