Yesterday evening I bought a pint for the evening TTK meeting but it was off and horribly sour on first taste (I like sours, but this was not good). So was the second pint drawn by the bar steward, so I switched to something else. The evening went OK but when I got home and tried to sleep I got what is technically known as "massive gut rot" and had to sit up a lot of the night etc. I seem largely better now, and no technicolour yawn happened. Didn't go into uni: did supervision on Teams.