IO540 wrote
What is a Run and Break?
Put simply, a military manouevre to reduce the chances of being shot down whilst on a long straight final.
The pilot will fly at high speed along the runway, either from a low level approach or from a dive from the overhead, before breaking off into an abbreviated circuit of oval shape.
The idea is that a fast moving object is hard to hit, and once on the oval downwind/base/final is never in a straight line long enough to get a decent aim for any enemy fire.
There will be those that say this is too simplistic but there we go
The high G part is where the pilot hauls back hard on the stick at the end of the initial high speed approach, in a steep climbing turn onto mid downwind.