IMHO,
well, the first FFK maybe because there is not time to meet, guess that's cipancipon fault...
and if the second FFK is really because his/her grandmother passed away,
I guess that is pretty reasonable rite?
after all, if he is with his family to pray for his/her grandmother, sure he dunwan the phone to ring rite?
and maybe after praying all done, then he receive ur msg, all his emotion erupted and being sent back to you lo...

OR maybe i am wrong...
Just wanna share my opinion about this matter..

I guess this is only back to cipancipon to explain...