I feel myself shaking in my sleep?

I had a dream last night about crazy people. This guy got kidnapped and put into a straight jacket, then in a coffin propped up against a wall. He passed out and was left in there for a year. When he finally woke up, he smelled horrible, and there were flies on him. He grunts and struggles and falls out the coffin. When he looks up, the two guys who kidnapped him are standing there pointing guns at him. He somehow gets out of the straight jacket and points a gun at the two men, I don't know where he got the gun from. One of the two men then say "If you let us live, you can walk out here freely". The guy shoots them both and they die. From the wall behind them, a few mob bosses in expensive suits start shouting and start shooting at the guy through the wall. The guy shoots back an somehow manages to kill all the bosses. He collapses from fatigue and relief, rolls over onto his back to find this crazy girl with wild hair, crouching on the ceiling recording him with a surveillance camera and pointing a gun at him. All he could say was "Oh f***" before the girl leaped down on him and stabbed him to death with a pen.

The scene changed, though it was still in te same building. Another crazy man was tied to this cart kind of this, which rolled along a track with bars along the bottom. The only way he could move the cart was by biting onto to bars to pull himself. After a while he just started gnawing on a single bar. He moved himself to a door which had a lock on it, in which he proceeded to scream and chew on it.

Is it normal I found myself shaking when I woke up?