James Buchanan “Bucky” Barnes is a fictional superhero that appears in American comic books published by Marvel Comics. He was originally introduced as a sidekick to Captain America by Joe Simon and Jack Kirby. Buky is brought back from supposed death as the brainwashed assassin Winter Soldier and later assumed the role of Captain America when Steve Rogers was presumed dead. Take a look below for 23 more interesting and fascinating facts about Bucky Barnes.

1. Bucky Barnes was only 16 years old when he was sent into World War II to be Captain America’s sidekick.

2. Bucky’s guns have palm print sensors, which means that if someone else tries to use them, they will explode.

3. Thanks to an upgrade by The Fixer, the Winter Soldier was able to emit a burst of fire from his mechanical arm.

4. “Sputnik” is a trigger word implanted in Bucky so that if anyone ever says it, Bucky becomes unconscious.

5. He has, from concealment, thrown a 60 centimeter long knife to penetrate the thick winter uniform of a German soldier with enough accuracy to pierce their heart in high Arctic winds from several meters away.

6. While filming Captain America: The Winter Soldier, Sebastian Stan would walk around all day practicing his moves with a plastic knife because he wanted his movements to feel natural.

7. In the comics, Bucky didn’t fall from a train. Captain America and Bucky were actually stuck in an airplane that exploded, which is why Captain America was frozen and why Bucky lost an arm.

8. The name Winter Soldier comes from the writing of Thomas Paine, the American revolutionary.

9. Bucky used to be known as one of the few comic book deaths that actually meant something. At one point there was even something known as the Bucky Clause, stating that, “No one in comics stays dead except Bucky, Jason Todd, and Uncle Ben.”

10. Bucky Barnes has thrown a shield so precisely that it intercepted a sniper bullet. Another time, he threw a shield that sliced Hawkeye’s arrow in half mid flight.

11. A lot has been said of Natasha Romanoff’s sex life with Avengers from Hawkeye to Bruce Banner, but in the comics, she and Bucky have a very interesting relationship that’s almost normal.

12. It was revealed in Wolverine Volume 3 #38 that Bucky had a hand at helping Wolverine escape from the Weapon X program.

13. Bucky’s code name Winter Soldier could have multiple sources of meaning. Winter could represent his maintenance as he is kept on ice whenever he’s inactive. It could also represent that fact that ‘s a relic from the Cold War or that his humanity was stripped to make him the coldest of assassins.

14. The Winter Soldier can throw a shield fast enough to slice through human limbs, control panels and assault rifles.

15. Sebastian Stan originally auditioned for the role of Captain America but got the role of Bucky Barnes.

16. As Captain America, he possesses the original, indestructible, vibranium alloy shield used by Steve Rogers, as well as a Kevlar and Nomex blend, shock absorbing costume.

17. Winter Soldier’s left arm is a cybernetic prosthetic with superhuman strength and enhanced reaction time. The arm can function when not in contact with Barnes and can discharge bolts of electrical energy from its palm.

18. Bucky is fluent in many languages, including English, Spanish, Portuguese, German, Russian, Latin and Japanese.

19. In the alternate reality of the five issue Bullet Points miniseries, Bucky never teams up with Steve Rogers as the Super Soldier program never happened.

20. In the House of M reality, Bucky is one of the United States government agents sent to Genosha to kill Magneto and as many of his followers as possible.

21. In the alternate reality Marvel MAX series U.S. War Machine, Bucky was serving in the present as Captain America as Steve Rogers had died in World War II.

22. Bucky, as a teenager, will appear as a member of the Battleworld Runaways during Secret Wars.

23. Bucky’s death has also been used to explain why the Marvel Universe doesn’t have any young sidekicks, as no responsible hero wants to endanger a minor in that way.