I went to Vienna for a conference. After an early flight and almost no sleep, I was exhausted when I got there, and I headed for a hostel and slept for a while. In the evening I got up and explored the city, randomly wandering the streets. It was hot and humid, and I stopped often for drinks and snacks.
In the evening, as I walked back to the hostel, I felt a sudden thud on my shoulder. I looked around, and found myself face to face with a grasshopper of terrifying size. Where he had come from, I don't know, but I recoiled in horror, the confusion of the situation only getting worse as I realised you can't recoil very far from your own shoulder. I slapped frantically and twitched across the pavement, getting rid of the beast but attracting confused looks from a passer-by.
I didn't have much time to spare in Vienna. I was giving the penultimate talk of the conference, so I spent the whole week preparing it and stressing about it. I went for a walk one afternoon when there were no conference sessions and wandered randomly around Vienna.