Step 4 Embrace the pleasures and possibilities that come with doing things alone, like eating out on the spur of the moment and traveling spontaneously.
So someone who does something on the spur of the moment - and that's the expression we would use, " on the spur of the moment" - is someone who does something without planning on it.
Alexander famously holds A sort of a ad hoc spur of the moment made up of what we have around us, kind of legal counsel to sort of represent the league of Corinth in miniature.