reasoning from the bottom of my pants
"I'd rather be a live mouse then a dead lion" is one of my favorite quotations. The reason for me not willing to demo spins for my students are;
1. Training needed
2. Low time instructor
3. Haven't done a spin since 1992
4. Didn't recieve spin training during my FI/A training nor CPL
Although; I do teach spin entry demos and spiral desents, but a full spin - not for now... but want to be able though.