facebook taboo - You comment on someone's wall and then you see them in the h

You comment on someone's wall and then you see them in the hallway and you're both thinking 'I know you know' and it's like the worst thing ever.

I wrote 'You're the most annoying person' and then I saw you and it was like the worst thing ever.

I said 'You're a disaster' and we both met in the hallway and it was the worst thing ever.

I posted 'You're the worst' and then we both saw it and it was the worst thing ever.