My bike lock stopped working. I bought a new bike lock, with four keys and a special bracket to attach it to the frame. The next day my new bike lock fell off the bracket in transit and is now lost. As a temporary measure, I went back to using my old bike lock as a prop. You can pull it apart without a key, but it looks like my bike is locked. Yesterday I forgot to take my old bike lock key with me at all, which wouldn’t have been a problem except that my old bike lock has unaccountably started working again, so I had to walk home. Now I find that I can no longer locate my old bike lock key.

As is so often the case, Plan D involves a hacksaw.