Telling the interviewer “That’s a great question. Can I have a moment to think about that?”

It’s really stressful to feel like you have to have an instantaneous reaction. I got this advice and it’s helped me feel like I can be human (which a good employer will not see as a demerit - empathetic people are the ones you want to work for!). Helpful whether you genuinely could use a sec to collect your thoughts so you know what you want to say, or would just like the momentary mental space/breather. Then actually allow yourself to DO it - take your time! I’ve even found that, done diplomatically, it can actually make you look really thoughtful.