Green Flash
Something similar was doing the rounds at Kings School at Gutersloh in the 70's. It did cause sharpe intakes of breath, as a large number of kids there, being of army origin, had been born in and always lived in Germany, it being an army home posting.
Anyway, although the story was going round, apparently about someone who'd been at Kings, no one seemed to know anything about him, so, I doubt there was any truth to it.
Although having said that, apprently, so my mother told me, ladies, with child in Cyprus, who's hubby were stationed at Nicocia, were put into hotels in Larnaca, when nearly due, and then rushed blue light style to the BMH at Dhekalia at the first sign of labour. Apparently, this was because the Cypriots would lay claim to any babies born in the Republic, not on the SBA. So I guess if it didn't happen in Germany, it could have in Cyprus.