Dreams.

I kept having this dream all night, every time I dozed off. The last one was the longest, and it went something like this: I started noticing some weird lightning outside, visible through the walls. Then, announcements started blaring over the loudspeakers (I don't know if you have those, but we do...), explaining that there were already fatalities and urging everyone to stay inside. After that, I watched as some kind of electrical thing formed in the courtyard, either sucking air in or blowing it out – there were no other options. I kept sitting at my computer, and then suddenly, a small electrical ball flew out of it, heading straight for my room. I reacted quickly and ran out, and now this electrical thing appeared in my room too... Then, I found myself in a lecture hall of some university or something similar (I don't know how I got there), and the situation continued. People were sitting around, talking to each other or to the professor. Then, the thing outside seemed to stop, and the people wanted to open the windows because they were hot. I had to explain to them how stupid they were and that they shouldn't do that. Anyway, they started hating on me, but they didn't open the windows, and after a while, those strange lightning flashes appeared again. And then something else happened, but I don't remember it very well.
I woke up with my arm and shoulder numb.