How to pronounce “flash back” in English

And so he very nicely rode the elevator for 20 minutes waiting the ad to flash back, so he could take a picture,

That company if you flash back to before Katrina, Hurricane Katrina, and the tragedy there.

Over the years since that trip to India, I would flash back on Scott's experience in the Jain temple,

But I want to sort of flash back for a few years.