Deja Vu
You've probably heard of "deja vu," the illusion of having previously experienced a situation that is happening now. Here are some  related expressions

Feel like I've...

...milked this cow before: deja moo

...seen this strange animal before: deja gnu

...smelled this bad odor before: deja phew

...visited this menagerie before: deja zoo

...scared this person away before: deja boo

...read this mystery book before: deja clue

...been in this courtroom before: deja sue

...seen that guy befoer: deja who

...played with that toy train before: deja woo - woo