Re: Instructor got mad because I didnt fall
On other threads, people have discussed the fact that if you know what technique is coming, it's pretty easy to resist. So, as uke, you need to keep an open mind, and not clamp down against that particular technique. I personally find it helpful to do the first few repetitions of the technique fairly lightly, to learn or refamiliarize myself (and whoever I'm working with) with the general outline of the technique.
If your partner is having difficulty with a technique when you resist, they have a couple of options. One is to ask you to lighten up for a bit as they learn this technique. The other, probably more appropriate for a senior dan rank (although it depends on the school, I guess) is to slow down and figure out how to make it work. Even senior dan rank people occasionally come across an unfamiliar technique, or have an "off" day.
Restist, ok, but also communicate!