Twas on the Monday morning ... (Well, OK, Sunday afternoon).
The sun is shining in my study window, so I pull down the roller blind. The plastic "chain" that operates it breaks (actually, it's a nylon cord with little plastic balls on it that operates a toothed wheel). Fortunately the break isn't on a piece that passes through the mechanism, so while I'm downloading Solaris patches, I think about ways to fix it.
Ah! I'll saw the end off a biro, and glue the two ends of the broken chain into the piece of tube thereby formed. So I find a dead biro, and start to remove the little plastic plug in the end, using the scalpel that lives on my desk.
The scalpel blade snaps off and falls into the keyboard of my Sun workstation.
So now I have a broken blind, a broken scalpel and there's a very sharp piece of metal hiding in the keyboard somewhere.
Perhaps I'll go for a coffee.