In article , Guy Alcala
writes
The V-2 was supersonic as it came down, so it would explode first then the sonic
boom would be heard. Whether this was identifiable above the sound of the
warhead explosion itself, I couldn't say. Probably not by the average
bystander.

I'd imagine that would be pretty low on their priorities at that moment,
as they say "If you heard the bang you'd survived".

--
John