WRITE SOMETHING ABOUT MEETING PEOPLE OR A PERSON (OR ANIMAL, OR SPACEMAN, OR...) COMPLETELY DIFFERENT FROM YOU OR YOUR CHARACTER
This could be a cultural difference. Suddenly you find yourself looking round to see what to do in the mosque, or presenting yourself in a nudist colony.
It could be a moral difference. Someone one with completely different values from yourself/your character. A suicide bomber, a prostitute, a mercenary.
It could be life-style difference. Someone vastly more wealthy, or vastly poorer, than yourself. A star celebrity, a politician, a phone-hacker, an ex-nazi.
Meeting a mystic or monk or nun dedicated to work away from ‘the world’, a different life from the one you’ve been used to, but find you can no longer live.
A boy from all boy’s educated and no sisters meeting a girl. Here the ‘completely different’ is in part in his mind as well as experience.
Meeting a lion - safari, at the coliseum dream, a child's story, an SF in which it's been discovered how to represent lions' 'thoughts' in some way, perhaps with lines into their brains.