Pérák

Pérák is very similar to the more-famous Spring-heeled Jack, as well as Le Loyon and the Mad Gasser of Mattoon.

History
Pérák, also known as Springer or Spring Man, (deriving from the Czech word "péro" meaning “spring") was a humanoid entity reported in the Czechoslovakian city of Prague during the German occupation of Czechoslovakia in the midst of World War II.

At first, Pérák was seen by the populace as a menacing, almost demonic figure to be feared. Early versions of the story have the mysterious apparition scaring or chasing and terrorizing innocent people, and even killing or raping citizens, and people began to avoid going out at night or refusing to go to work night shifts at the weapons factories to the extent that it even had a negative impact on the Nazi arms production output. However, this image as a sinister and diabolical boogieman quickly changed. Word began to spread that Pérák was starting to turn his attention on the German occupying forces, sabotaging their equipment and leaping from the shadows to slit their throats before bounding away.

Trivia

 * Pérák is very similar to the more-famous Spring-heeled Jack, as well as Le Loyon and the Mad Gasser of Mattoon.

There are several explanations as to what the creature could be. Theories include:

 * A Human Prankster.
 * A Extraterrestrial.
 * A Demon who came to punish the wicked.
 * A Ghost of a soldier who seeks revenge against the Nazis.
 * A Hoax or a rumor.
 * A Man taking the law into his own hand.
 * A Supernatural Being.
 * An Angel who came to clean the earth.