On Friday, leaving the building already quite late in the evening, I unexpectedly found a flat in the Marathon Plus rear tyre.
After the inevitable faff of changing that, the track pump there was generally buggered (which isn't unusual) and not feeling like pumping the tyre up with the minipump, I used a CO2 cartridge.
<Bang>
At that point, I'd had enough, and went back indoors, washed all the grime off of my hands, got changed, and took the tube and tram home.
So, this morning I have to do the reverse, with several spare tyres, so I should have enough to repair the tyre, after attempting to discern why that last inner tube didn't survive.
It's the first time I've avoided cycling this year, so I don't feel too guilty!