I guess you had to be there
What you say when you’re trying to be polite but you’re really just trying to save your own sanity.
'I guess you had to be there' when my friend told a joke that took 10 minutes to tell.
'I guess you had to be there' when my friend told a joke that even my math teacher groaned at.
'I guess you had to be there' when my friend told a joke that made my brother say, 'Why?'