Ah, I hadn't thought of that. I've invented a few fictional reasons why Tim would freak out but I never thought about it within the actual show and never thought about it in regards to Tony. As for having hands tied or sensory deprivation, I think someone could be coaxed through it, even if it was their trigger because the partner can let their presence be known. I can't see Tim ever pushing Tony to do something he doesn't want to do but I can see Tony doing it, trying to prove something to himself. Hmmm.....