Hi Nim! Hmm...? Do you have a vid of the match? (it could be stored in the recent battles section of Replay). There is no air grab out of PO B+K. Are you thinking of 6B+KBBB?
Hmm... I tried looking for it but I forgot to save our replays in My Battles after I reviewed them. I've tried to figure out in training what it was I saw but I don't know lol. It'll come up again eventually I'm sure. I think maybe it's a trap/follow-up.