hair standing on back of neck

That means they scared you or sent off vibes that caused you to become very alert.

so what should i do?

nothing...

That is a slang term

"Hair standing on ends"

Like the slang term

"Yellow-bellied, flim-flamer, kangusmangus, coward"

The term "Yellow" means to slow down and be gripped with fear.
Yellow is often used in paintings of the past to depict a foolish ( stupid ) uneducated, character. This was before and prior to the religious movements where Yellow in a painting usually depicted a "Holy" ( High among high figure ) AKA "Blessed Fool" AKA "Saint"

Again it also as somebody said "surprise".

hmm i think nil just leove if got for now

should i talk to this person again ?

No. They probably won't make any sense, anyhow.

I went and spoke again,Help!