Jolt

n.
  1. A sudden shock or jerk; a jolting motion, as in a carriage moving over rough ground.
  2. A physical or psychological shock; see jolt v. t. senses 2 and 3; as, the stock market plunge was a big jolt to his sense of affluence; he touched the casing of the ungrounded motor and got a jolt from a short inside.
  3. Something which causes a jolt{2}; as, the bad news was a jolt.