sometimes you just want to get away. things are too much for you. your situation is weighing heavily on your psyche. you are buried at work. stifled at home. Like this giant trying to break out in Seward Johnson's The Awakening.
Sometimes there is nothing out there to blame your trouble on you are just at lose ends, looking for someone or something to bite, chew-up and spit out.
Don't worry I don't really feel THAT bad, but a little chewing and spitting is always good for relieving stress.