Part of jacks childhood

In a varnai(strigoi) facility in Pennsylvania:

Jack(age 14): (Waiting in a arena-like space to test his combat and strength,with a very anxious look on his face.)

(The gates open about 24 A-rank ghouls rush out)

Jack: (Surrounded by ghouls, he's scared and his heart pounding, he puts up his guard his inverted singular kakugan flares up.)

(The ghouls rush at him and try to bite him and use their kagune to try and kill him.)

Jack:(Dodges some of the kagune strikes and punches a ghoul so hard its head exploded into paste, he huffs and puffs.)

The ghouls:( tackle him and start trying to stab him with their kagune but they couldn't pierce his flesh.)

Jack:( Snaps a ghouls neck barehanded and rips its head off and uses its body as a meat shield/club.)

The ghouls:( Surrounding him to get him on the ground and start stomping on him, Jack screams from the pain.)

Jack:(blacks out then comes to, the field littered with ghoul corpses, him drenched in blood holding a ghouls spine, he is horrified of what he did.)