Sometimes, when the words come hard, I'm still fiddling around at teatime.

有的时候写得不顺，到下午茶的时间我还在晃荡。

Mathis fiddled at the back of the set.

马西斯在布景的后面摆弄。

So there is zero chance that he could have been fiddling at the time.

所以他当时可能在摆弄的可能性为零。