Being able to stop, hold and articulate your natural feelings is a hugely necessary skill in improv. There are many people out there who can’t do that. The moment you make them think about what they’re saying or feeling and ask them why —- all their awareness vanishes. Can you imagine your co-worker, after they say something like how they “hate French Vanilla coffee” being asked “why?” They’d look at you and just say “what do you mean WHY? I just DO.”