So, I have a break between my classes and I spend it in the building's little 'lounge' on my laptop, usually listening to music and internet surfing or watching stuff on Netflix.
Well, I started watching a movie on Netflix which opened with some sort of loud obnoxious rumbling explosion sound, and it took me a couple minutes to realize why everyone was giving me dirty looks...
My headphones were on!! ...they just weren't plugged in.
./fail