[amsat-bb] Any evidence of unscheduled voice QSOs between ISS SSTV transmissions?

I know the Cosmonauts sometimes make unscheduled voice QSOs between ISS SSTV transmissions but I can't remember exactly where I have read or heard that.

Especially nice would be audio and/or video recordings with both the SSTV and voice QSO intact in the recording.

Twitter, posts, blogs, articles etc are also very helpful.

Thanks,

John Brier KG4AKV