@Alex
Yoshiki got over excited, he was being like a kid that over excited to a huge strawberry chocolate icecream that he hadn't tasted for the last 10 years. I find it amusing and really love seeing on how these guys (not only Yoshiki) behaved on the stage. Pretty same as when Toshi cried during singing Forever Love. They just.. being who they are.. not need to be full controlled and all that stuff to protect your image.
You know what i mean yeah?
There's also another scene where Yoshiki and Toshi fell down together and Pata stood besides them laughing.
And why should you be embarrassed being there? I find it strange.