It is a sign or your age, because as a kid in the SFV, we had them all the time, Bang bang.
The landing was "picture perfect" and welcomed.
Here's a little bit of the science.

Thanks for the reply... I grew up near an ANG base before the population in the area complained enough to get them to stop breaking the sound barrier over the lake... All I can remember is K-Boom... I slight preliminary K-... Do not recall two distinct Booms as discussed here.
Could it be the jets were so close it combined them?