Yes, I was caught out unexpectedly by this parting of the ways one day. Of course, it happened when I was on my way to lunch and I went from very smart to somewhat ridiculous in two seconds flat. However, my very helpful bus driver offered me some black masking tape he just happened (joked he had no idea why it was there but now he knew!) to have in his bag. I simply wrapped it round and round the offending shoe and dignity preserved. Incidentally, not one of my dining companions noticed this even though the shoes were pale green. I now carry my own tape at all times ...just in case.