[ It isn't a pleasant subject Nagi shifts to, but it is an important one. Omi isn't sure how common it is for someone to not remember such a thing, but it seems reasonable here. If Nagi is bothered over the lack of memory for such a critical life-changing event, Omi wants to reassure him.]

...It happened really fast, and you probably didn't see the vehicle before it hit you. There may not be anything about it for you to remember, if it sent you immediately unconscious.