fig sound phenomenon

Interesting fig phenomenon I noticed today: after rinsing a ripe fig with water, pressing it slightly on the sides made it emit a sort of buzzing sound out of the little hole at the tip. Each time I pressed (lightly) again, the buzzing would start, and each time I let up it would stop.

It almost seemed like there might be an insect inside, complaining about being pressed. But it seemed more likely that pressing on the fig made it expel air, which made the noise. It was surprising how long it kept doing it, though. I'd have thought all the air would have been expelled much sooner. Maybe it was sucking air back in each time I released the pressure. After repeated light pressing on all sides, probably squishing the fruit too much, the sound finally died down. Upon cutting it open, it was a normal fig inside; no insect.

I've never noticed other figs to do that. I tested a few other figs after that one, and a few had similar sounds, but quieter and much shorter lived.