Viewed again with an experienced friend. Pony behaved exactly the same but I had a totally different feeling about him. I liked him and had no anxiety at all. My friend also really liked him. So I think the 'bad vibes' were due to too many bad experiences viewing not-as-described ponies. Ie "my stuff" not anything I was picking up from him. I did things like round the world, scissors, touching tail and ears, riding backward - Kids stuff that they will do. He was totally fine. He also got tangled up in clipper cable (owner was leading him not me!!) and he didn't freak. He is hard to get moving and stops when you stop riding forward but that's fine by me. Next step: get the kids on him and see what they think. But I've got a good feeling about this now.