Sounds like ‘toss bombing’ which is more usually associated with the Bucaneer, but it wasn’t done inverted! There is a proper term for this low level technique, it aided in getting the aircraft away from the blast area as quickly as possible as it pulled up into the loop and headed off from wence it came.

Over-the shoulder I think is a term for one technique and LABS another, I think earlier one. The difference was in the point in the pull up in a half loop that the bomb was released. All a bit hazy now but I have a book around here where the author, an FAA test pilot, describes the techniques, which one of several such books I am not certain ATM.

I recall the grins on our faces on Ark many years ago when a Sverdlov shadower that had been creeping up near and nearer on our port quarter suddenly sheered off as the splash target was straddled by a group of 1000lbers from a Buc’ doing a practice. We on the flight deck at the time were aware of the bombing exercise in progress and had spotted the twinkle in the air over on our port bow as the Buc’ pulled up so we were waiting for the splash.