Re: Jamming a technique
IMHO most "jammers" work from either the position of ego and or the pre-knowledge of the technique and therefore the manner in which they can resist it.
I have rarely learned anything from a jammer other than about their personality/attitude.
When faced with a jammer I like to stand there an smile and then allow them to do the technique on me as I perform the role of Uke to help them to work on their flow and technique. As uke I am working on my flexibility and discovering places I might reverse the technique or apply a good atemi (in my mind).