Thread (one's) way through (something) American verb phrase
To carefully move through the space between people or objects which are blocking your way
The mother threaded her way through the crowd to find her son.
I'm threading my way through the busy streets to go to the school on time .
The verb "thread" should be conjugated according to its tense.
A person who is completely unknown or has no connection with you
The guy I talked to at the prom last night is a perfect stranger.