They have a characteristic aerial courtship display which culminates in the pair locking talons mid-air and whirling earthwards in series of spectacular cartwheels.
If the midlayer ionization is strong enough compared to the signal frequency, a scatter wave can exit the bottom of the layer earthwards as if reflected from a mirror.
However, the attempt nearly ended in tragedy when the balloon envelope ruptured near maximum height, sending the spherical pressurised gondola plunging earthwards.
