That sounds like the terrified tone of a djinni that knows his days are numbered. Remember this when you hit the Other Place - I'm doing you a favour.

[Bartimaeus is not selective in who exactly he fools here, but he'll not be spoiling exactly who his target is quite yet.]

Rest assured that I am not counting the seconds until your arrival. While he is an affront to djinnikind, I'm not the one sharing a skull with him.