Nervous woman laughing during a dance lesson

I was attending a beginner's salsa lesson in which this one woman kept on laughing and laughing. Apparently, she didn't feel confident about doing the moves. She must have felt nervous, and so she'd start laughing when it came time to try the moves.

This got to be a little annoying.

I understand that some people have a harder time than others. Heaven knows that I'm not a natural dancer. I also understand that some people can get nervous. If you're an adult though, you should know enough to squelch the laughter at inappropriate moments. Being nervous is understandable, and to some extent, even the laughter is understandable. Adults should know self-control though, and they should know that laughing doesn't help.

This reminds me of the ladies in my cardio gym class who'd start giggling when the instructor would ask us to do a move that they had trouble with. I don't think that's excusable either -- not unless you're a little girl. If you can't do the move, then either adapt the moves, leave the class, or take a break. Giggling and laughing are not excusable in mature adults.