Every once in a while you make a seemingly innocuous choice and later you learn some details of what might have happened had you chosen differently.
Today I have learned some details about what would have happened if I had cancelled my plans last night (go see my  osteopath) and taken up on another offer.

Alas I must remain a tease and not divulge details but all I can say is that I have missed out on a chance in a lifetime.
I suspect that this opportunity will never exist again in my spacetime.

Arg.

[Edit:  Auto correct had me go see my sociopath, which would have been a very different kind of evening..]