The purpose of this question is to give an opportunity for the participants to get their feelings and emotions off their chest and get ready for the intellectual analysis in the latter phases of debriefing.
Many facilitators avoid or skip any discussion about feelings and emotions during the debriefing.
If you really believe in tapping into emotional intelligence and combining it with the other forms of intelligence, you probably would not skip this phase of debriefing. But this does not mean that you should overemphasize the discussion of feelings. Explain that your aim is just to give people an opportunity to briefly vent their frustrations or share their elations and move on to the other phases of debriefing. Treat the statements as bits of information and not as personal attacks. Don't get defensive.