A toilet roll hanging on the coat hook in the toilet at work so I had nowhere to hang my jacket.
People talking at the next desk when I had stayed back late at work to get work done without being interrupted by people talking.
The way my thigh muscle went 'twang' while attempting to sprint (aka lumber).
Feeling dead tired for no good reason (except for the beautiful spring weather).
Otherwise, a very sound day with a wholesome bread roll for lunch, lovely company and an occasional sense of achievement.