YOU SAID:
Psssst! Flashback's up!
INTO JAPANESE
チッ!フラッシュバックが始まったよ!
BACK INTO ENGLISH
Tsk! I'm having a flashback!
INTO JAPANESE
チッ!フラッシュバックが起こっている!
BACK INTO ENGLISH
Tsk! I'm having a flashback!
That didn't even make that much sense in English.