Made this because in the second part of the class trial, the execution was the main thing that got corrupted for some reason.
So here.
spoilers (just in case someone stumbles upon this)
Explanation of the execution:
Since the person being executed is unlucky, the execution is based on the luck based game called Russian Roulette.
Basically, there's a gun with 1 bullet in the chamber, and two people take turns shooting the gun at themselves. To win, you have to be the last person alive, so you have to hope the other person shoots themselves. It's just a very risky game, xdd.
Fuko and BlackJack play this game, and the one who survives gets to escape.
BlackJack, during the execution, has flashbacks from her friend dying from being shot, which is in Episode 11 (S3).
BlackJack shoots Fuko, and BlackJack collar explodes. Basically, the summary of the execution.
BlackJack is a future Hope agency member, which is explained in previous episodes and the trial. Future Hope Agency members are not supposed to harm participants, or they'll risk their collars exploding.