Thunder..

Grace is ten years old, Baldrick is eleven. 
He is terrified of thunderstorms and fireworks and she is not.
Baldrick can hear the distant  thunder when we hear nothing.

Recently he has begun to associate rain with potential thunder and asks to come inside by launching himself against the glass doors or violent scratching.
When he did it yesterday, without reason, S told him that it was all ok, no thunder.
He accepted the explanation for a short time, then did it again. S told him once again  that there were no thunderstorms. 
At this point Baldrick stared up at the dark clouds and down again, twice, with a "if you say so but I beg to differ" look on his face.