I think you're right, I think I was racing them, not the track and I muffed it. I think I was too hot through ten as a result. I'm still dissecting it.
I know I cocked up, still trying to figure out how.
I think you have it, TBH.
Momentary lapse of concentration. I think if you had more experience, probably not an issue. But as a first timer, you really need to stay very, very focused because this is so new, fast, different, exciting, fun, etc. Lots to easily distract the mind.
This is why one of the few suggestions I made was riding you own race.
Anyways...this is a learning moment for you. I guarantee 100% you're a better rider next time out.
So you have that going for you anyways....
How's the wife feel about all of this?