For BUFDRVR - bouncing bombs were known about in WW2 - skip-bombing.
Very effective against ships (Bismarck Sea). Was also used against
tanks. (And big dams) We just didn't expect to see it at Avon Park
that day in 1968. It was a low ceiling, under 1000 AGL, and we
couldn't dive bomb. Our IP had big ones and gave us the choice of
dropping or aborting to fly the mission again on a better day. We
wanted to drop so he led us around the pattern. About the third time
around the Range Officer called a halt as the bouncers were going off
the south end of the tactical range and that was it for the day. We
formed up and got another thirty minute of wing weather time going
home. We did get an actual road cut - one of the bombs hit the
thin-layer asphalt-on-sand road around the end of the tac range and
cratered it nicely. (500# concrete filled M82 dropped at 450 KIAS) I
suppose that would be a major incident these days. Back then it was
just worth a chuckle or two. Sigh. Skip bombing went out of favor just
before/during SEA - flak. We used to bet on range scores - hits 'on
the fly' were all that counted in operational outfits, dropping blue
bombs (BDU33) in level flight at 50' agl and 450 against a 10x20 cloth
target. Going below the range tower's sight line - about 40') was a
foul - no score.
Walt BJ