Thanks Mr. Scraggy Anorak.

Sam Nelson wrote:

Never seen or heard of that before---but it's just plain silly. Or desperate.
Just as a matter of interest, did any of them ever shoot anything down?

Utter desperation. They shot down lots, if developed better & earlier
in the war, they'd probably have won it. I've heard from a reliable
source (ex-bomber gunner) that if one decided to pick on you, then
you'd probably be dead very shortly. Far faster than anything else in
the sky and very little you could do about it. Allied fighters used to
loiter in the area of the Luftwaffe airfields to try to nail them as
they glided in to land; no hope of catching one in flight.